Which forms of the word: "modify" will fit the sentences given below?

This session was very interesting but we will do minor _____ for future. The new rule required the police to __ their ways of interrogation. After the rejection of my presentation, I _____ it for better results.

The first blank requires the plural noun "modifications" (minor modifications). The second needs the base verb "modify" after "required to" (required to modify). The third uses the past tense verb "modified" after the subject "I" (I modified). Option A correctly provides: modifications (noun), modify (verb), modified (past tense verb).