In What Order Are the Fundamental Forces Unified as Temperatures

Multiple Choice

In what order are the fundamental forces unified as temperatures increase from low to high?

A) electromagnetic and gravity combine first, then strong, finally weak
B) electromagnetic and strong combine first, then weak, finally gravity
C) weak and strong combine first, then electromagnetic, finally gravity
D) electromagnetic and weak combine first, then strong, finally gravity
E) gravity and weak combine first, then electromagnetic, finally strong