I need help with some Java online course I am taking. This is in the Java main language.

What do the principles of notice, choice, onward transfer, and access closely apply to? a. privacyb. identificationc. retentiond. classification

Which demographic challenge is europe currently experiencing? a. an aging and decreasing population b. a baby boomc. an unequal distribution between males and females d. a large group of teenagers moving through the school system(i chose a but i'm unsure)

How often does colleges update the cost of attendance on their website? . a)every two years b) every four years c) every year d) every semester