Rita is adding 3 + (–8) + 1. she rewrites the expression as 3 + (–1) + 8. what is rita’s error?

she used the commutative property, which cannot be used with negative numbers.

in the new expression, –8 and 1 should both be negative.

she used the associative property which should only be used with positive numbers..

she switched the negative signs for –8 and 1.