Please explain to me these Writing MCQ's

Test Preparation
1

<p>(Remove spaces)</p>

<p><a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/ehKEMBf.png
Answer: A</p>

<p><a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/X45GUPq.png
Answer: C</p>

<p><a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/QOKUDvl.png
Answer: C</p>

<p><a href="http://i.imgur"&gt;http://i.imgur&lt;/a>. com/nFJ6FTh.png
Answer: D
For this one, I would have thought the distinction between the Welsh Celtic language and the Breton's origins in France would have required a "but"</p>

2

<p>1) <<by>> should be <<in>>
2) <<that>> should be <<for>>
3) I think your answer key is wrong/you recorded the answer wrong. I think the answer is B, for <<it>> has no antecedent.
4) The Breton emigrants were distinguished by their Celtic origin, with about 40 percent of those who emigrated speaking a Celtic language… <—correct answer</it></for></that></in></by></p>

<p>the “but” answer would be this:</p>

<p>“The Breton emigrants were distinguished by their Celtic origin, but about 40 percent of those who emigrated spoke a Celtic language.” </p>

<p>but is usually used as a conjunction to show contrast/something unexpected. If the Breton emigrants have Celtic origins, then why would it be a surprise that they spoke a Celtic language?</p>