In the caribbean, puerto rico and jamaica are islands of the

They're part of the greater antilles

The Greater Antilles

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.

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