Mr. Duncan raised an unnecessary question __________ he then failed to find an answer.
#76286
A
to which
B
for which
C
with which
D
by which
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The old man had one son and two daughters,     treated him well,     made him very sad.
#76918
A
neither of whom; that
B
neither of them; which
C
none of whom; which
D
none of them; which