How would the climate of a coastal city differ from that of a city at the same latitude located farther inland?

The corrects answer is D) the coastal city would have cooler summers.

The climate of a coastal city differs from that of a city at the same latitude located farther in land in that the coastal city would have cooler summers.

The coastal cities have more humidity because they are next to the sea. This helps the city in that the breeze makes the climate feel cooler. In the inland cities you can have extreme temperatures. For instance, cold mornings and night, but hot during the day.  

The other options of the question were a) they are at the same latitude so their climates would not differ, b) the coastal city would have hotter summers, and c) the coastal city would have cooler winters.