A company develops a gaming application that it intends to sell. One of the scenarios that the sales team is concerned about is when multiple users use the app from multiple devices for a single fee if the lopin credentials or security access key is shared among the members. What is the best solution to prevent this? a. Use the registration technique. b. Use the activation technique. c. Define copyrights to prohibit access on multiple devices. d. Uninstall the app automatically on one device, if it is accessed from another.