Tension in an Accelerated System

[whoareyou]

Homework Statement

The Attempt at a Solution

"Any objects attached to the rope will have the same magnitude of acceleration as the rope." So since no mass is given, I assumed all the masses are the same. So wouldn't A be the answer?

 

[gneill]

The tension F_T3 only has to accelerate the third mass upwards. F_T2 has to accelerate both the second and third mass. F_T1 has to... you get the picture. So the tensions are not equal.