Which of the Following Statements Regarding a TCP Sliding Window

Which of the following statements regarding a TCP sliding window are false?

A) The sender advertises the size of the initial window.
B) If the sender does not receive an acknowledgment message after the retransmission timer times out, it retransmits the unacknowledged data.
C) The sliding window size can only be increased or remains unchanged.
D) A TCP sliding window allows the sender to send multiple data packets before receiving an acknowledgment message.
E) The sender does not need to transmit packets with a complete window size.