You log in to an application and the server sets the following cookie:

Set$-$cookie: sessid$=$amltMjM$6$MTI$0$MToxMTk$0$ODcwODYz; What can you deduce about this cookie?

a$.$

It is difficult to mount a brute force attack to guess other application users$$ token.

b$.$

It is impossible to find the meaning from the session token.

c$.$

The sessid cookie contains a Base$64-$encoded string.

d$.$

The session token may be comprised of meaningful user specific data.