Which expressions are equivalent to 4b?

choose all answers that apply:

(choice a)

b+2(b+2b)

(choice b)

3b+b

(choice c)

2(2b)

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$