Three Workers Run a House Painting Business and Always Work

Three workers run a house painting business and always work the same number of hours together. The paint they use requires applying two coats. Each worker paints 200 square feet per hour using a roller or 80 square feet per hour using a brush. If a technological advance provides a paint that only requires one coat, their average labor productivity per hour as a team:

A) increases.
B) decreases.
C) remains the same.
D) may either increase or decrease.