In statement given below, a part of the sentence is enclosed in quotation marks. Below are given alternatives to the quotes part which may improve the sentence. Choose the correct alternative. In case no improvement is needed, option 'D' is the answer.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