フリー問題

問題文

A person uses one mail address as the recovery address for a bank, a shop and a social account. The mail account itself is guarded by a password and nothing else. Which statement is correct?

選択肢

1. The mail account is the strongest duplicate in that arrangement, because a stranger who opens it can request a quote for every service that trusts it, so the mail account deserves the most factors and a nickname that is not used at any other machine.
2. The mail account is the strongest dependency in that arrangement, because a stranger who opens it can request a reset for every service that trusts it, so the mail account deserves the most factors and a passphrase that is not used at any other service.
3. The mail account is the strongest duplicate in that arrangement, because a stranger who opens it can request a quote for every service that trusts it, so the mail account deserves the most factors and a passphrase that is not used at any other service.
4. The mail account is the strongest dependency in that arrangement, because a stranger who opens it can request a reset for every service that trusts it, so the mail account deserves the most factors and a nickname that is not used at any other machine.