A C4 plant like corn or sugarcane would not thrive in a cool shady forest because of: a. insufficient ATP for carbon fixation
b. lower environmental availability of CO2
c. increased photorespiration
d. increased partial pressure of O2 inside the plant leaves

The correct answer is - B. lower environmental availability of CO2

Explanation:

In C4 plants they have developed a mechanism for the CO2 concentrating and leads to the lower environmental availability of CO2 for these plants, C4  to avoid photorespiration.

These plants tend to be found in drier environments with high sunlight levels and not thrive in a cool shady forest due to this mechanism that results in low availability of carbon dioxide.

age range would be the answer