3[单选题]
<span style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'">Mary's going to study abroad next year,<u><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></u>, for sure, delights everyone.</span>

A.who

B.that

C.this

D.which