Which sentence is written correctly with parallel structure?

a) in order to complete your application, schedule an interview, get three recommendation letters, and pay the $50 application fee.
b) in order to complete your application, you must schedule an interview, get three recommendation letters, and pay the $50 application fee.
c) in order to complete your application, you must schedule an interview, you need to get three recommendation letters, and pay the $50 application fee.
d) in order to complete your application, you must schedule an interview, get three recommendation letters, and you need to pay the $50 application fee.