Students ove the age of 14 who accumulate unexcused absences in a period of 90 calendar days be ineligible to receive or maintain driving privileges

This statement is in accordance to the attendance policy in driving schools pertaining especially to students. Students whose age belongs to 14–18 age bracket and who has accumulated 15 unexcused absences in any consecutive 90 calendar day period can be reinstated held licenses if they accumulate 30 consecutive days of attendance. 

I’d say letter a..