For years, rita visited her friend's house near the ocean. she noticed that her own home, far from the beach, experiences much greater swings in temperature. what is the reason for this difference?

The reason for such difference is the presence of large bodies of water.

Explanation:

Large bodies of water could be a large lake, sea or ocean.

The presence of large bodies of water can affect the climate of an environment.

One of the regions where the greatest swings of temperature occur are areas that whose proximity from water is far.

The difference in temperature of Rita's and her friend's residents is due to the fact that water heats and cools more slowly than landmasses, so Rita's friend will experience cool temperatures

a and b because with the other three, they simplify to something else.