Reading the textbook, pp$.203$ff$.,$ which one of the followings is the truest one?

Stating that $"$No S are P$,"$ it in class notation means that:

a$)$ No member of the S class $[$which is not a member of P class$]$ is a member of the P class $[$which is not including a

member of S class$].$

b$)$ No member of the S class is a member of S class excluding a member of P class.

c$)$ No member of the S class is a member of P class including a member of S class.