Under the same solar radiation conditions, the temperature changes between sea surface and land surface are very different. At the same latitude, the sea temperature is lower and the land temperature is higher in summer. In winter, the land temperature is lower and the sea temperature is higher. In mid-latitudes, the highest and lowest monthly average temperatures in the ocean and land are generally different. Wang Li chose to go to Yantai, which was influenced by land and sea factors.

Therefore, choose: B.