What Is the Required Cement Content of a Concrete Mix

What is the required cement content of a concrete mix requiring 295 pounds per cubic yard (lb/yd³) of water, air content of 5%, 28-day compressive strength of 4,000 psi and a water/cement ratio of 0.48?

A) 141.6 lb/yd³
B) 614.6 lb/yd³
C) 1,920 lb/yd³
D) 8,333 lb/yd³