The correct answer is C indeed. You should always use pointing words. If you don't your paragraphs might be incoherent and may lack cohesiveness.
It's b, as that is in the subjunctive tense
Discuss these and ensure they have a sense of their meaning. Challenge the students to compose their own figures of speech on each of these themes using the sample idiom as a starting point.
Hope this helps!
Both wrote against proper beliefs and view at the time.