Please choose the correct answer to the question: During most of the year, the air over Boston, Massachusetts, contains a high amount of moisture. Which of the following best explains why there is a high amount of moisture in the air?

Answer1: Boston is close to an ocean. Answer2: Boston is at a low elevation. Answer3: Boston is near many mountains. Answer4: Boston is far north of the equator.

Answer format: answer1/answer2/answer3/answer4