I need help in this question!!!

Question

CD has an endpoint at (2,-1) and a midpoint at (8,3). which measure is closest to the length of CD?
A. 20.4 units
B. 8.4 units
C. 14.4 units
D. 11.7 units

Answer 1

2√((8-2)^2+(3+1)^2) = 14.4

Answer 2

thank very much Steve