Marisa will hire x junior directors and y senior directors. Since she needs to hire at least 10 staff members, x+y≥10. Each junior director will be paid $640 per week, and each senior director will be paid $880 per week. Marisa’s budget for paying the new staff is no more than $9,700 per week; in terms of x and y, this condition is 640x + 880y ≤ 9,700. Since Marisa must hire at least 3 junior directors and at least 1 senior director, it follows that x≥3 and y≥1. All four of these conditions are represented correctly in choice B.