Question 99157
This problem is constructed upon distributive law, which states relation between conjunction and disjunction(in fact it similiar to that of multiplication and addition- a*(b+c)=a*b+a*c ) Now getting back to logic we have
A&(B v c) (==) (A&B) v (A&C) - Distributive law of conjunction with respect to disjunction 
It is quite amusing that whole problem is just 1 damn law- no thinkink - you know it and if not you are in deep.....this is how study books should not look like.....