im not sure either B or D b is the only one with evidence
Explanation:
Most chemical chain reactions have very reactive intermediates called free radicals. The intermediate that maintains the chain reaction is called a chain carrier. These atoms or fragments are usually derived from stable molecules due to photo- or heat-dissociation
The results are considered more reliable, based off the fact that when other scientists redid his experiment they found similar results but it’s not enough evidence to be more
