For Which Value Of $x$ Does $7 x ^ { 2 } - 7 x + 16$

Multiple Choice

For which value of $x$ does $7 x ^ { 2 } - 7 x + 16$ reach a minimum? Restrict your attention to the horizontal span of 0 to 7.

A) 16
B) 14.25
C) 0.5
D) 0