A. the resultant of the parallel forces is zero
B. the algebraic sum of all the moments of the forces is zero
C. all the parallel forces must be equal in magnitude and direction
D. the sum of forces in one direction must be equal to the sum of forces in the opposite direction
Correct Answer: Option C
C. all the parallel forces must be equal in magnitude and direction
Explanation
all the parallel forces must be equal in magnitude and direction