Answer: C) replication.
Step-by-step explanation:
Replication in experiments is the process by which the entire experimental process is repeated as done by the previous scientists, keeping in mind all the necessary requirements and experimental conditions so as to determine the correctness of the experimental methodology, relationship between the variables, correctness of the results and other parameters.
Here, several group of students are repeating the same experiment and getting the same results this process is called as replication.