In plants, the option that shows the range of environmental temperature and CO2 to O2 ratio which favours photorespiration is:

Explanation

Photorespiration is a process in plants where the enzyme RuBisCO oxygenates RuBP, leading to a decrease in photosynthetic output. This process is most active at high temperatures and when the CO2 to O2 ratio is low, as RuBisCO has a higher affinity for oxygen under these conditions. Therefore, option C is correct as it describes a high temperature with a low CO2 to O2 ratio, both of which promote photorespiration.