Solve the Problem $\mathrm { A }$ And $\mathrm { C }$

Multiple Choice

Solve the problem.
-A lake lies between $\mathrm { A }$ and $\mathrm { C }$ , and lines $\mathrm { AB }$ and $\mathrm { DE }$ run north-south. If $\overline { \mathrm { AB } } = 7.1 \mathrm { mi }$ , $\overline { \mathrm { DE } } = 1.5 \mathrm { mi }$ , and $\overline { \mathrm { DC } } = 1.4 \mathrm { mi }$ , how far is it from $\mathrm { A }$ to $\mathrm { C }$ ? Round to the nearest tenth.

A) 7.0 mi
B) 7.6 mi
C) 6.6 mi
D) 5.2 mi