Find the Midpoint of the Line Segment Joining the Given $( 0 , - 1 , - 3 )$

Multiple Choice

Find the midpoint of the line segment joining the given points. Select the correct answer.
$( 0 , - 1 , - 3 )$ and $( 2 , - 3 , - 1 )$

A) $( - 1 , - 2 , - 1 )$
B) $( - 1,1 , - 2 )$
C) $( - 1,1 , - 1 )$
D) $( 1 , - 2 , - 2 )$