Which of the following has the greatest heat resistance?

• A. None of these in particular --all have excellent heat hardiness.
• B. Tall fescue.
• C. Perennial ryegrass.
• D. Creeping bentgrass.

Answer: (A)

Heat resistance is about a grass’s ability to stay healthy and keep growing under high temperatures. In this item, the idea is that there isn’t a single standout among the options; all listed grasses are regarded as having strong heat tolerance, so none clearly exceeds the others. The best choice, then, is that there isn’t a greatest heat resistance among them—they’re treated as equally hardy in hot conditions. (In real-world terms, some grasses may perform better in heat under specific conditions, but the question here treats these options as having comparable heat tolerance.)