A Section of an Exam Contains Two Multiple-Choice Questions, Each

A section of an exam contains two multiple-choice questions, each with three answer choices (listed "A", "B", and "C") . List all the outcomes of the sample space.

A) {AB, AC, BA, BC, CA, CB}
B) {AA, AB, AC, BB, BC, CC}
C) {AA, AB, AC, BA, BB, BC, CA, CB, CC}
D) {A, B, C}