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

Colleges update the cost of attendance on their websites A. every year. 
Each year, before new students are supposed to enroll in that particular college, colleges update their websites to provide the newest information for future freshmen. Although usually the cost of attendance doesn't change drastically, colleges still need to update their websites at least once a year.