In the following questions, a part of the sentence is underlined . Below are given alternatives to the underlined part at (a), (b) and (c) which may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (d)

Since she directing the play for quite some time, she knows the actors really well.

A. Since she has directed

B. Since she has been directing

C. Since she was directing

D. No improvement

Please do not use chat terms. Example: avoid using "grt" instead of "great".