Answer:
The purpose of OPPA is (B) It prohibits the use of information of users by third-party vendors.
Step-by-step explanation:
OPPA stands for Online Privacy Protection Act. OPPA requires "operators" of commercial Web sites or online services that collect "personally identifiable information" from "consumers" to post a "conspicuous privacy policy" on their Web sites that describes the type of information that is collected and with whom this information is shared. Therefore OPPA prohibits the use of information of users by third-party vendors.