Read these sentences from a student essay and then answer the question.

(1) Manjiro is a fourteen-year old boy who becomes stranded on an island and is hoping to be rescued. (2) William is a young boy whom everyone believes to be crazy, because he wants to build his own windmill to harness energy. (3) Both boys must face their fears to overcome obstacles.

If it were added to the beginning of sentence 3, which transition would best clarify the relationship between the two ideas?

Again,
Yet,
Also,
While,