Three Objects Are Moving Along a Straight Line as Shown

Multiple Choice

Three objects are moving along a straight line as shown in the figure.Taking the positive direction to be to the right,what is the total momentum of this system?

A) +106 kg ∙ m/s
B) -106 kg ∙ m/s
C) +14.0 kg ∙ m/s
D) -14.0 kg ∙ m/s
E) 0.00 kg ∙ m/s