Minerals form from magma is predictable patterns in a process known as

Minerals form from magma is predictable patterns in a process known as Bowen's reaction series. The Bowen's reaction series represent the conditions under which different igneous are formed and created and explains why certain types of minerals tend to be found together and other don't.  It also explains why as a magma cools at specific temperatures specific minerals are formed.

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