<p dir="ltr" style="text-align: justify;"><span><span style="">The sentence is this question uses the second conditional. The </span></span>second conditional <span><span style="">talks about a situation which is unlikely to happen and to imagine the result of the situation. </span></span></p><p><span style="text-align: justify;">The </span><span style="text-align: justify;">second conditional:</span><br></p><div dir="ltr" style="" align="left"><table class="classic-table"><colgroup><col></colgroup><tbody><tr style=""><td><p dir="ltr" style=""><span><span style="">If + S + simple past, S + would/ could/ should/ might + the basic form of a verb</span></span></p></td></tr></tbody></table></div><p><br></p><p>In the second conditional, when the subject in the if-clause is “I,” “he,” “she,” or “it,” the verb is “were” instead of “was” in formal writing. Thus, the correct answer is (A) were. </p>