What is the sum of the roots of (x-1)(x+2)(x-3) X ... X (x+98)(x-99)(x+100) = 0?

Question

A. -50
B. 50
C. -100
D. 100

Answer 1

+1 -2 +3 -4 +5 .....+99 -100

=

+1 +3 +5...... +99
-2 -4 -6...... -100
--------------------- ADD
-1 -1 -1 ..... -1 :)
LOOKS LIKE AROUND -50