Sentence Improvement - Verbal and Reasoning

Directions to SolveIn questions given below, a part of the sentence isitalicised and underlined. Below are given alternatives to the italicised part which may improve the sentence. Choose the correct alternative. In case no improvement is needed, option 'D' is the answer.
Q1:

The poor villagers have waited in the bitter cold for more than 4 hours now.

A have been waiting

B had waited

C has been waiting

D No improvement

ANS:A - have been waiting

No answer description is available.