Anti$-$virus programs, or virus scanners, operate in two ways, one of which is known as signature$-$matching. In this method, the program attempts to:

Question $2$ options:

a$)$

Match the signature of the virus to various known definitions

b$)$

Match the behavior of the virus to certain known actions

c$)$

Match the signature of the virus to various known ciphertext

d$)$

Match the signature of the virus to various known behaviors