The Only Two Forces Acting on a Body Have Magnitudes $\degree$

Multiple Choice

The only two forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80 $\degree$ .The resulting acceleration has a magnitude of 20 m/s².What is the mass of the body?

A) 2.4 kg
B) 2.2 kg
C) 2.7 kg
D) 3.1 kg
E) 1.5 kg