Which Statement Is Correct Regarding Priority in Rights to the Computer

Which statement is correct regarding priority in rights to the computer?

A) XYZ Electronics had priority only if XYZ Electronics perfected its security interest within 10 days of the purchase.
B) XYZ Electronics had priority only if XYZ Electronics perfected its security interest within 20 days of the purchase.
C) The bank had a security interest in the computer because it perfected its security interest before XYZ Electronics did so.
D) The bank had priority because the computer was considered after-acquired property properly covered by the initial security interest.
E) XYZ Electronics had priority because XYZ Electronics had a purchase-money security interest in the computer.