Four Records Have the Record Structure: EQUIPMENT (EQUIP#,LOCATION)

Multiple Choice

Four records have the record structure: EQUIPMENT (EQUIP#,LOCATION) . EQUIPMENT (204,1)
EQUIPMENT (204,2)
EQUIPMENT (208,1)
EQUIPMENT (209,1)
When sorting these records,which field is the primary sort key and which field is the secondary sort key?

A) EQUIPMENT is primary; no secondary sort key is required.
B) EQUIP# is primary; no secondary sort key is required.
C) EQUIP# is primary; LOCATION is the secondary key.
D) LOCATION is primary; EQUIP# is the secondary key.