Discover a world of knowledge at Westonci.ca, where experts and enthusiasts come together to answer your questions. Join our platform to connect with experts ready to provide precise answers to your questions in different areas. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

Which security measure might a system implement when detecting unusual activity from a device, resulting in access denial with a message prompting the user to retry later?
a. Two-factor authentication
b. CAPTCHA verification
c. Device fingerprinting
d. IP address whitelisting