I think it is either a or b
I hope this kinda helps you
The increase in the number of surveys related to dogs in the period may have occurred due to the increase in the number of cases of non-elderly dog deaths.
First, an initial research was done to identify if there were any pathological or external agents, such as the weather, that explained the dogs' death. Once the causative agent is discovered, further research is commissioned to understand the mechanisms of action of the causative agent of death and ways to prevent such events from happening.
Reform? I am not to sure, sorry I am only in 8th grade.
a or the top and that is all but it says i need 20
