Which two situations require a data type? (Choose Two)

Which two situations require a data type? (Choose Two)
A . A Currency drop-down is populated with values from an external system of record.
B. Patient medical history is accessed from and written to an external system of record.
C. A Work preference picklist is populated with two values: Full time and Part time.
D. A Date of account creation field is set to a default value of the current date.

Answer: A,C