Alice and Bob are using RSA encryption to communicate securely$.$ Alice's public key

is $(e=43,n=77),$ and her private key is $(d=7,n=77).$ Alice wants to sign

the document, $M=7,$ for Bob. What is the value of the signed document in the

given RSA scenario?

Select one:

a$.28$

b$.-7$

c$.43$

d$.35$