The expression $M(M + M) = M$ is best explained by which combination of Boolean theorems?

Question

Accepted Answer

Idempotent ($M + M = M$) and Absorption ($M \cdot M = M$)

Answer

Domination only

Answer

De Morgan's theorem only

Answer

Double complement only

The expression M(M+M)=MM(M + M) = MM(M+M)=M is best explained by which combination of Boolean theorems?