Which substitution should best be used in solving the recurrence T(n) = 5T(4n/3) + 2?

a) n = (3/4)^k

b) n = (4/3)^k

c) n = (15/4)^k

d ) n = (20/3)^k

e) n = (3/20)^k

f ) n = (3/15)^k

g ) n = 2^k

h ) n = 3^k

i ) n = 4^k

j ) n = 5^k