The correct answer is - D. Savannah is more humid and has higher precipitation than San Diego.
Despite both Savannah and San Diego being on the coast of an ocean, they do have differences in the climate. Savannah comes out on the Atlantic coast, while San Diego comes out on the Pacific Coast. Savannah is influenced by warm and wet air masses all year round, while San Diego is predominantly influenced by dry air masses because of the colder ocean currents. Savannah has a relatively stable temperature throughout the year, and it also has solid amount of precipitation, with the humidity in the air being always high. San Diego, on the other side, is hot for most of the year during the days, but the nights are relatively cool. There's very little precipitation, and the humidity in the air is not as high as in Savannah.