Let$$s suppose that instead of using a simple monoalphabetic substitution cipher $($MSC$),$ Alice decides to do something different and use three such ciphers, applying them in succession in the following way. First, she encrypts the plaintext using an MSC with her first key, to create the first ciphertext. Then, she encrypts that ciphertext using an MSC with a second, different key, yielding a second ciphertext. Finally, she encrypts that ciphertext with a third key, yielding a third ciphertext that she sends to Bob.

Which of the following statements is most true?

Group of answer choices

The resulting cipher is generally going to be more secure than if Alice had used just one MSC$,$ since Eve must perform three decryptions to uncover the plaintext.

The resulting cipher is generally going to be more secure than if Alice had used just one, since the mapping between the plaintext and the third ciphertext is no longer one$-$to$-$one.

The resulting cipher is generally going to be less secure than if Alice had used just one, since the result of the third encryption will always be more vulnerable to frequency analysis than the first.

The resulting cipher is generally going to be less secure than if Alice had used just one, since Eve can recover the plaintext if she recovers any one of the three keys.

The resulting cipher is generally going to be equally secure as if Alice had used just one, since for any three monoalphabetic substitution cipher keys applied one after the other, there exists another, single monoalphabetic substitution cipher key that achieves the same result.