Why should User Authentication not be suitable with HTTP sessions?

Why should User Authentication not be suitable with HTTP sessions?

A.
Because User Authentication requires authentication scheme that requires persession authentication

B.
Because User Authentication requires authentication scheme that would not work with HTTP authentication

C.
Because User Authentication requires authentication on a per-session basis which in contrast to HTTP that requires in many sessions

D.
Because User Authentication requires authentication scheme that requires persession authentications

E.
Because User Authentication requires authentication on a per-session basis which in contrast to HTTP that requires in one session