Which two AMP script functions should be used in the setup?

An email requires custom AMP script to append the subscriber’s zip code to a link in the email. A field name zipcode already exist in the sending data extension. Its important Marketing Cloud tracks subscribers who click on the link.

Which two AMP script functions should be used in the setup? Choose
A . 2Lookup
B . Contact
C . RedirectTo
D . HTTPGet

Answer: B,C