What is the difference between the ACK flag and the RST flag?

What is the difference between the ACK flag and the RST flag?
A . The RST flag approves the connection, and the ACK flag terminates spontaneous connections.
B. The ACK flag confirms the received segment, and the RST flag terminates the connection.
C. The RST flag approves the connection, and the ACK flag indicates that a packet needs to be resent
D. The ACK flag marks the connection as reliable, and the RST flag indicates the failure within TCP Handshake

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Answer: B