A Company Sells Two Products with Information as Follows

A company sells two products with information as follows: The products are machine-made.Four units of Product A can be made with one machine hour and two units of Product B can be made with one machine hour.The company has a maximum of 3,000 machine hours available per month.
-The company can sell up to 7,000 units of Product A per month,and up to 3,000 units of Product B for the month.What is the optimum product mix to maximize company's operating income?

A) 2,000 units of A and 4,000 units of B
B) 6,000 units of A and 3,000 units of B
C) zero units of A and 3,000 units of B
D) 12,000 units of A and zero units of B