The succession of insects coming to the dead body is

predictable based on current weather conditions
predictable based on temperature
unpredictable
varied and interesting

The succession of insects coming to the dead body is predictable based on temperature

Explanation:

The development of insects in a dead body depends on a specific temperature. it takes a time of 500 hours to reaches that temperature after the death of that person. The development of insect increases typically at warm climates.  

Generally, the blood of insects is cold. So, climate will prevent their growth. The weather in which death incident has happened affect the temperature around the corps and determined the succession of the insects over the body.  

it's c. (to reduce the greenhouse effect/carbon gasses)