Which of the following watering regimens will be most effective at keeping a lawn green during the hot, dry summer months?

A) daily sprinkling to soak the soil to 0.5 inch
B) sprinkling every other day to soak the soil to 1.0 inch
C) sprinkling every third day to soak the soil to 2.0 inches
D) daily sprinkling to soak the soil to 0.5 inch or sprinkling every other day to soak the soil to 1.0 inch
E) sprinkling every other day to soak the soil to 1.0 inch or sprinkling every third day to soak the soil to 2.0 inches