Solve
-Andrea's Sleeping Bag Is Designed for Camping in Temperatures $-7^{\circ} \mathrm{C}$

Solve.
-Andrea's sleeping bag is designed for camping in temperatures of $-7^{\circ} \mathrm{C}$ or warmer. For what Fahrenheit temperatures is her sleeping bag designed? Round to the nearest tenth of a degree.

A) $45.0^{\circ} \mathrm{F}$ or warmer
B) $-21.7^{\circ} \mathrm{F}$ or warmer
C) $-35.9^{\circ} \mathrm{F}$ or warmer
D) $19.4^{\circ} \mathrm{F}$ or warmer