Which of the following would be the most appropriate way to protect data in transit?

TLS 1.3 is the most appropriate choice for protecting data in transit because it is the latest, most secure, and most efficient version of the Transport Layer Security protocol. It provides strong encryption, authentication, and integrity for communications over a network, effectively securing data as it moves between systems. SSL 3.0 is an outdated and insecure protocol with known vulnerabilities, making it unsuitable for protecting sensitive data. SHA-256 is a hashing algorithm used for data integrity and digital signatures, not for encrypting data in transit. AES-256 is a symmetric encryption algorithm used for confidentiality, but it is a component of a secure communication protocol like TLS, not a complete solution for data in transit by itself.