If 20 cm³ of distilled water is added to 80cm³ of 0. 50 mol dm-³ hydrochloric acid, the new concentration of the acid will be

A. 0.10mol dm-³
B. 0.20mol dm-³
C. 0.40mol dm-³
D. 2.00mol dm-³

Correct Answer: Option D

D. 2.00mol dm-³