Improve the highlighted part of the sentence. Choose 'No improvement' as an answer if the sentence is grammatically correct.
He's take an course in marketing.

The correct answer is (b) taking a course.
Explanation:
The verb "take" needs to be in the continuous form "taking" to describe an ongoing action. The correct sentence should be "He's taking a course."
Meanings of all options:
· Takes: Simple present form of "take," not suitable for continuous action here.
· Taking: Present continuous, used for ongoing actions.
· Take: Base form of the verb.
Correct sentence:
"He's taking a course in marketing."