What is a coastline plain

A coastal plain is a flat, low-lying piece of “land next to the ocean. Coastal plains are separated from the rest of the interior by nearby landforms, such as mountains. In western South America, a large coastal plain lies between the Andes Mountains and the Pacific Ocean.”

A coastal plain is a flat, low-lying piece of land next to the ocean. Coastal plains are separated from the rest of the interior by nearby landforms, such as mountains.

The sun's parallax would be 180 degrees, greater than which you can't get.  so a. would be your anwser