Select the most appropriate idiom that can substitute the highlighted words in the given sentence.
Some people still feel that they have very little freedom to be innovative in their work.

Correct option is A

The most appropriate idiom that can substitute the highlighted words in the given sentence is (a) elbow room.
The idiom "elbow room" is used to refer to the freedom to move or act as one wishes. Therefore, the sentence means that some people still feel that they have very little freedom to be innovative in their work and don't have enough elbow room.