Where should the fulcrum be located in this lever to get the greatest mechanical advantage?
a) at position ii, because the effort arm and the load arm should have equal lengths
b) at position iv, because the effort should be applied as close to the fulcrum as possible
c) at position i, because the length of the effort arm should be greater than the length of the load arm
d) at position iii, because the length of the load arm should be greater than the length of the effort arm