As Part of Their Studies of Drugs Used to Treat

As part of their studies of drugs used to treat infections, two groups of 10 students are given a list of 20 drugs to recall - the first group a list of antibiotics and the second a list of antifungal treatments. Each student is then asked to recall as many of the drugs listed as possible. The following information is collected Antibiotic - 15, 12, 18, 20, 17, 16, 20, 20, 19, 20
Antifungal - 17, 20, 20, 18, 20, 16, 15, 18, 17, 19
What type of design would you consider this study to be?

A) Between participants
B) Survey
C) Within participants
D) Participant observation