Final answer:
The correct answer is option C. 80-90 °F.
Step-by-step explanation:
The maximum cardinal temperature range for most plants is typically between 80-90 °F (26-32 °C).
Plants have a range of temperatures within which they can survive, and their growth and biological processes are influenced by temperature. While plant activities, including growth, tend to increase at higher temperatures up to a certain point, growth diminishes and can even decrease above the optimum temperature for growth. For most plants, this occurs around 80-90 °F.
It's important to note that there are exceptions to this range, with some plants adapted to temperatures well below freezing or tolerant of temperatures above 40 °C.