How does the TLS 1.3 protocol handshake enhance network security and performance compared to its predecessor TLS 1.2?

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A It removes symmetric encryption completely.
B It reduces the handshake to a single round-trip time (1-RTT) and deprecates insecure cryptographic primitives like MD5 and SHA-1.
C It mandates the use of static RSA keys for key exchanges.
D It encapsulates the entire handshake within unencrypted HTTP headers.