What are the limitations of Vulnerability scanners? (Select 2 answers)

A.
There are often better at detecting well-known vulnerabilities than more esoteric ones

B.
The scanning speed of their scanners are extremely high

C.
It is impossible for any, one scanning product to incorporate all known vulnerabilities in a timely manner

D.
The more vulnerabilities detected, the more tests required

E.
They are highly expensive and require per host scan license