Which formula defines the sequence f(1) = 2; f(2)=6,f(3)=10,; f(4) = 14; f(5) = 18 ? O A) f(1) = 2; f(n) = 6 + f(n - 1) for n > 2 O B) f(1)=2.f(n)=4+f(n-1) for n > 2; c)f(1)=2; f(n) = 2 + f(n - 1) for n > 2 O D) f(1) = 6f(n) = 4 + f(n - 1) for n > 2