A grass adapted for cooler climates or the cooler part of the growing season in Virginia, when temperatures range from 60° to 75°F (16 to 24°C) is:

• A. Cool-season Turfgrass
• B. Warm-season Turfgrass
• C. Transitional Turfgrass
• D. Desert Turfgrass

Answer: (A)

Think about how grasses are classified by the temperatures they prefer. Cool-season turfgrasses are those that grow best when it's cool, especially during spring and fall, roughly in the 60 to 75°F (16 to 24°C) range. In Virginia, that cool window supports grasses like Kentucky bluegrass, perennial ryegrass, and tall fescue, which stay green and actively grow in these temperatures and may slow or go semi-dormant when it gets hot. Warm-season grasses, on the other hand, thrive in hotter conditions and don't perform as well in these cooler temperatures. Desert turfgrass refers to grasses adapted to arid desert climates, not typical for Virginia’s cool-season window. Transitional turfgrass covers grasses that tolerate a broader range, but the question specifically points to cooler-climate adaptation, making cool-season turfgrass the best fit.