Which of the following lines gives an overview of the message while sending an email?

The subject line gives a brief overview or summary of an email's content while it is being sent.

The To line holds the recipient's address, not a summary of the message.

A Contents line is not a standard email field for summarising the message.

The Cc line lists additional recipients who get a copy, not an overview of the content.

A clear subject helps the reader judge the message before opening it.

Email standards define the subject as a header field of the message.