<p>Norwegian writer Sigrid Undset (is like) the novelist Sir Walter Scott (in) her use of historical backgrounds, but unlike (his books), she dwells on the psychological aspects of her characters.</p>
<p>The answer is C. I would have picked C if the two people had not been different genders, but since they are different, it seems to me that "his books" clearly refers to those of Sir Walter Scott. Someone explain to me how "his books" is not clear enough of a reference.</p>
<p>The television station (has received) many complaints (about) the clothing advertisements, (which some) viewers condemn (to be) tasteless.</p>
<p>The answer is D. I'm just wondering, would the correct form be "to being"</p>