Correct Answer:
Option C - If two clauses are connected with relative pronouns, verb is used according to the antecedent of relative pronoun.
Here, the antecedent of the relative pronoun (that) is 'matters' (plural) then plural verb (disturb) will be used.
Correct Sentence -
This is one of the matters that disturb me the most
C. If two clauses are connected with relative pronouns, verb is used according to the antecedent of relative pronoun.
Here, the antecedent of the relative pronoun (that) is 'matters' (plural) then plural verb (disturb) will be used.
Correct Sentence -
This is one of the matters that disturb me the most