A friend provides 100 pieces of supporting evidence for a mathematical statement. What is the minimum number of counter examples needed to prove the statement false?

A. 1
B. 100.
C. It is impossible to prove the statement false. *****
D. 101.

Please check my answers!

Thank you

3 answers

I understand people are busy, but I need some help :) I cannot find any sources that can help me.
if anyone could answer i would appreciate it :)
only 1 counterexample is needed.
A math statement is supposed to be true for ALL instances.