Discover a wealth of knowledge and get your questions answered on IDNLearn.com. Discover the reliable solutions you need with help from our comprehensive and accurate Q&A platform.

In the step by step simplification of expression below which property is not used?

3(1+x)
3(x+1)
3(x)+3(1)
3x +3 

A) associative B) commutative C) distributive D) identity