Select all that apply $[$point deduction on every wrong selection, partial point on every correct selection$]$: Bob is launching a new secure messaging app, BobCrypt. When Alice installs the app, it creates an account for her on the BobCrypt server using a hash of her phone number. The app then queries the server by sending the hash of each phone number in Alice$$s address book to learn which of Alice$$s friends already have BobCrypt accounts. The goal is that users can discover their friends$$ accounts without the server learning the contents of every user$$s address books. Does this scheme achieve the intended security goal? A$.$ Yes, the scheme can achieve the intended security goal because instead of showing the phone numbers, Alice's friends who have BobCrypt accounts will only show hash values when using the app. B$.$ Yes, the scheme can achieve the intended security goal because Bob will only get to know the hash value of a phone number in Alice$$s address book and cannot find out the real phone numbers of Alice's friends. C$.$ No$,$ the scheme cannot achieve the intended security goal because the hash function does not provide hiding property, such as nonce. Bob, who knows the hash function, can pre$-$calculate the hash values of all possible phone numbers, and later compare with user$$s hash value to determine real phone numbers of all BobCrypt users. D$.$ No$,$ the scheme cannot achieve the intended security goal because Bob can reverse the hash values of Alice's address book to find out phone numbers of Alice's friends.