Select the most appropriate option that can substitute the highlighted segment in the given sentence.
RN Right’s literary works helped redefine discussions in race relations in America in the mid-20th century.

Correct option is D

The correct substitution of the highlighted words is (d) of race relations in America.
Explanation:
· The phrase "discussions in race relations" is incorrect because "discussions" typically take the preposition "of" when referring to a topic.
· The correct phrase should be "discussions of race relations", meaning discussions about or concerning race relations.
Grammatical rule used:
· "Discussion of" is used when referring to the subject or topic being discussed.
· Example: The discussion of climate change was informative.
· "Discussion on" can also be used, but it is less commonly preferred in formal writing.
Corrected sentence:
RN Right’s literary works helped redefine discussions of race relations in America in the mid-20th century.