Answer
We can rank the four sections according to the magnitude of the torque:
$D \gt B \gt A = C$
Work Step by Step
We can write a general expression for the magnitude of the torque:
$\tau = \frac{\Delta L}{\Delta t}$
From this expression, we can see that the slope of the angular momentum versus time graph is the torque.
A graph with a steeper slope has a higher magnitude of torque.
We can see that section D has the steepest slope and section B has the second steepest slope.
Section A and section C both have a slope of zero.
We can rank the four sections according to the magnitude of the torque:
$D \gt B \gt A = C$
