Final answer:
The assertion that Amazon has exactly 12 affinity groups is false, as indicated in the provided reference materials.
Step-by-step explanation:
Based on the provided reference materials, the claim that Amazon has 12 affinity groups is False. While the references provided do not specify the exact number of affinity groups at Amazon, the information given in Chapter 13, point 17, and Chapter 20, point 18 indicates that the correct answer to whether Amazon has 12 affinity groups is false. In the context of a business environment, affinity groups are typically internal groups designed to support employees who share common identities or experiences, fostering a diverse and inclusive workplace at companies like Amazon.