Choose the correct sentence (A, B, C or D) that has the same meaning to the given one.
Unless you help me, I won't finish the work by deadline.
A.Because you helped me, I finished the work by deadline.
B.If you don't help me, I won't finish the work by deadline.
C.If you don't help me, I will finish the work by deadline.
D.Your help made me feel happy.