Question

The ramp with the smallest or greatest mechanical advantage is the steepest.

Answer 1

The ramp with the smallest mechanical advantage is the steepest.

In fact, the ideal mechanical advantage of a ramp is given by the ratio between the length L of the ramp and its height h:
$IMA = \frac{L}{h}$
The steepest ramp is the ramp with largest height h, therefore it is the ramp with the smallest mechanical advantage, because its ratio L/h is the smallest.