Based on this link’s format, why wouldn’t it have been re-written for tracking?

LenoxSoft’s Marketing Manager notices that clicks on the email link www.xxx.com aren’t being counted in the list email report.

Based on this link’s format, why wouldn’t it have been re-written for tracking?
A . The link should start with http or https to be automatically re-written.
B . The link should contain a wildcard to be automatically re-written.
C . The link should point to go.pardot com to be automatically re-written.
D . The link should be populated with variable tags to be automatically re-written

Answer: A