Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions :
Determine the intersection and union of sets A, B, and C as indicated, given
A = {5, 10, 15, 20}
B = {25, 30, 35, 40}
C = {10, 20, 30, 40}.
-Find A C.

A) { }
B) {10, 20}
C) {5, 15, 30, 40}
D) {5, 10, 15, 20, 30, 40}