Some of the sentences have errors and some have none. Find out which part of a sentence has an error, and the appropriate letter (A),(B),(C) is your answer. If there is no error, (D) is the answer.
$\underset{(A)}{\underline{\text{Frozen foods are so popular today /}}}$
$\underset{(B)}{\underline{\text{that many people wonder /}}}$
$\underset{(C)}{\underline{\text{how they ever lived without them./}}}$
$\underset{(D)}{\underline{\text{No error}}}$