For Part-Time Employees to Be Eligible to Be in a Company's

For part-time employees to be eligible to be in a company's retirement plan,which two qualifications must be met?

A) age 21 or older and worked 1500 hours in a year of service
B) age 21 or older and worked 1000 hours in a year of service
C) age 18 or older and worked 2000 hours in a year of service
D) age 18 or older and worked 1500 hours in a year of service