Ethylene,C₂H₄,reacts with Ozone,O₃,to Give Formaldehyde,CH₂O

Ethylene,C₂H₄,reacts with ozone,O₃,to give formaldehyde,CH₂O.Which set of conditions listed below favors the maximum yield of formaldehyde? 2 C₂H₄(g) + 2 O₃(g) 4 CH₂O(g) + O₂(g) + heat

A) high temperature and high pressure
B) high temperature and low pressure
C) low temperature and high pressure
D) low temperature and low pressure
E) not enough information is given