<li>Degado’s dilmma was like many other young writers: he had to choose between assured publication in a student magazine and probable rejection by a popular magazine. No Error.</li>
</ol>
<p>I dont understand why A is correct.</p>
<li>No matter how cautious snowmobiles are driven, they are capable of damaging the land over which they travel. No error.</li>
</ol>
<p>Why is it B?</p>
<li>The starling is such a pest in rurual areas that has become necessary to find ways of controlling the growth of their population. No error.</li>
</ol>
<p>The answer is D. should it be “its” instead of “their”?</p>
<ol>
<li><p>Illogical comparison. You cannot compare a dilemma with other people. It must be Degado's dilemma was like many other young writer's dilemma or something similar to that. </p></li>
<li><p>Adj - Adv Error. Cautious is being used to modify driven, therefore it must be cautiously because it is being used as an adverb not an adjective. </p></li>
<li><p>Yes it must be its instead of their because the subject starling is singular.</p></li>
</ol>
<p>5) It should be 'like that of many other's' because you are comparing Degaldo's dilemma to others' dilemmas, not Degaldo's dilemma to other people. </p>
<p>6) It should be cautiously, because it is describing the verb driven, so it should be in the adverb form, (adverb (mostly ly at end) describe verbs)</p>
<p>8) This is a classic writing problem, the subject is the starling, so what can you tell me about it? Yes, it is singular, one starling. So why would you describe it using their, a word used for a plural subject? So, they are trying to trick you by placing a plural subject in between to make you think that you need to use their. Just break down the sentence to its bare bones. </p>
<p>The starling is such a pest ("in rural areas") that has become necessary to ("find ways of controlling the growth of" = control) their population. No error.</p>