Explanation:
now, really !
you don't know, if 0 is larger than 16.4 or smaller than -16.4 or ... ?
0 is right between any negative and positive numbers. in integer view between -1 and +1.
0 is therefore larger than any negative number, and smaller than any positive number.
and -0 = +0 = 0
so, I hope, the position of 0 on the line of all numbers is now clear.
and it is also clear that when you multiply 0 with something else, the result is always 0. right ?
so, of course,
a
is correct.
0 is not greater than 16.4 (kills b and c).
0 is not smaller than -16.4 (kills d).