Recall Bonnie and Clyde from Problem 5

Recall Bonnie and Clyde from Problem 5. Suppose that their total profits are 72H, where H is the number of hours they work per year. Their utility functions are, respectively, U_B(C_B, H) = C_B - 0.03H² and U_C(C_C, H) = C_C - 0.03H², where C_B and C_C are their private goods consumptions and H is the number of hours they work per year. If they find a Pareto optimal choice of hours of work and income distribution, the number of hours they work per year is

A) 600.
B) 700.
C) 900.
D) 250.
E) 350.