Read the scenario carefully. After tapping "Done Reading", answer the deduction questions.
A woman has three jars of cookies: Jar A, Jar B, and Jar C. Jar A contains 10 chocolate chip cookies, Jar B contains 15 oatmeal raisin cookies, and Jar C contains 20 peanut butter cookies. She wants to put an equal number of cookies from each jar into a bag. However, she also wants to make sure that the total number of cookies in the bag is divisible by 3. What is the minimum number of cookies she can put in the bag?