The correct option is
Both are in Tanzania.
I'll upload a map for you, so you can see for yourself. :)
Election is a formal and organized choice by vote of a person for a political office or other position
elecution is the skill of clear and expressive speech, especially of distinct pronunciation and articulation.
Black holes themselves can not be seen, nor do they leave trails (since emptiness does not have to be caused by a black hole), but there is evidence for black holes: scientists can see the effects of their gravity on nearby stars. The answer is B.