Every asterisk in the equation \(2 * 0 * 1 * 5 * 2 * 0 * 1 * 5 * 2 * 0 * 1 * 5 = 0\) is to be replaced with either \(+\) or \(-\) so the equation is correct.

What is the smallest number of asterisks that must be replaced with \(+\)?

\( 1\)\( 2\)\( 3\)\( 4\)\( 5\)