In the following questions, a sentence/ part of the sentence is printed in bold. Below are given alternatives to the bold sentence/part of the sentence at (1), (2) and (3) which may improve the sentence. Choose the correct alternative. In case no Improvement is needed your answer is (4).
The clients are waiting outside since morning and will continue to wait until you meet them.

Options

A. have waited
B. have been waiting
C. were waiting
D. No improvement

Answer

B

Explanation

The work began in the past and still continues. Hence, Present Perfect continuous should be used.