Answer: The group to which coffee is given is called the Experimental group.
Step-by-step explanation:
The group that is being exposed to the coffee before the easy writing is called experiment group.It is also called as treatment group. This is the group which will taste coffee( receive the treatment) and write and essay on it.
They are the ones who is going to taste it and write an essay about its taste ,effect on the body or whatever the essay writing is about.
Later, this group will be compared to the other groups participating in the study.