A Tractor T Is Pulling Two Trailers,M₁ and M₂,with a Constant

Multiple Choice

A tractor T is pulling two trailers,M₁ and M₂,with a constant acceleration.T has a mass of 200 kg,M₁ has a mass of 100 kg,and M₂ has a mass of 150 kg.If the forward acceleration is 0.60 m/s²,then the horizontal force on the tractor due to the ground is

A) 270 N backward.
B) 270 N forward.
C) 150 N backward.
D) 150 N forward.
E) 90 N forward.