<p>Can someone please explain the following questions to me?</p>
<p>
Oceanographers are studying how the increased atmospheric concentration of gases like carbon dioxide and sulfur dioxide *elevates the acidity of seawater and its affecting fish*.</p>
<p>A) elevates the acidity of seawater and its affecting fish
B) elevate the acidity of seawater and how they affect fish
C) elevates the acidity of seawater and how that acidity affects the fish
D) elevate seawater acidity and its effect on fish
E) elevates seawater acidity for its effect on fish
The answer is C. Originally I chose B but I was told that even though there are two nouns, carbon dioxide and sulfur dioxide, you must put elevates. This is because you could use an analogy by saying an elevator “elevates”. I'm still not entirely sure and would like a different explanation, assuming there is another one.
``` The emissary for the committee stated that their position on the matter remained neutral and that no amount of cajolery would cause a shift in either direction. No error. ```
The answer is B. You would need to switch “their” to “it's”. I was wondering why you couldn't just use “their”. Is it because the emissary is speaking for the committee? If it said, “The committee stated their position, would it be right to leave “their” in instead of using “it's”?
``` The magician's skill and showsmanship inspired all the children at the party; many were even convinced that, if they tried hard enough, they could also learn to make a coin disappear. ```
The answer is E. I originally picked B because the “it” later on refers back to “many” and since there is a semicolon separating the two sentences, I thought that the sentence was too unclear without changing “many”. Is it right because the semicolon infers that that the previous sentence is related? And would the sentence after the semicolon been a grammatically correct sentence without the semicolon and sentence in front?
The following two were really confusing and I would appreciate a meticulous explanation.
``` The settlers experimented for months to find the best method to channel water from the river to their fields and homes. ```
The answer was C. I have no idea why is it wrong (even though it was already explained to me).
When the package arrived from Tanzania, Jerome could not have been more excited, his mind filling with images of the wonderful things his grandfather might send him from Africa.
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<p>I'm not sure what the exact answer was but I think it was E; I just know that it wasn't C. I thought C was wrong because I thought it should be “filled”. This one is mind-boggling. Apparently it's a phrase of some sort.</p>
<p>Thanks for taking the time to read this and I hope you can help me out.</p>