Please choose the correct answer to the question: Why do areas in the middle of a large continent generally have more extreme differences in temperature than areas near the coastline?

Answer1: There are generally more clouds near the oceans. Answer2: Landlocked areas are usually at a lower altitude than coastline areas. Answer3: Coastlines are usually surrounded by mountains that block air masses. Answer4: Oceans change temperature slowly and regulate the temperature of nearby land.

Answer format: answer1/answer2/answer3/answer4