What are the security risks of running a “repair” installation for Windows XP?

What are the security risks of running a “repair” installation for Windows XP?

A.
Pressing Shift+F10gives the user administrative rights

B.
Pressing Ctrl+F10 gives the user administrative rights

C.
There are no security risks when running the “repair” installation for Windows XP

D.
Pressing Shift+F1 gives the user administrative rights