Directions: Improve the bracketed part of the sentence.
Vishal (could be able to) work out these problems easily.

Options

A. a) should be able to
B. b) must be able to
C. c) can be able to
D. d) No Improvement

Answer

A

Explanation

should is used to say that you expect something is true or may happen.
Here, should be able to is the right usage.