geometry proofs please help giving 20 points if you can solve it

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

When are triangles considered similar? a. corresponding angles are equal andcorresponding sides are proportionalb. corresponding angles are proportional andcorresponding sides are equalc. corresponding angles are equal orcorresponding sides are proportionald. corresponding angles are proportional orcorresponding sides are equal select the best answer from the choices providedmark this and retumsave and exitnext

Ithink i know it but i want to be sure so can you me out ?