What does the BCC field in an email do?

The BCC (Blind Carbon Copy) field in an email allows the sender to send a copy of the email to multiple recipients without disclosing their email addresses to one another. This means that each recipient in the BCC field will not see the other BCC recipients, preserving their privacy. This is particularly useful in situations where you want to inform multiple people without revealing their email addresses, which fosters confidentiality and prevents reply-all clutter in email threads.

The incorrect options do not align with the function of the BCC field. Bringing attention to the recipient pertains more to using features like CC (Carbon Copy) or marking an email as important. Filtering out spam emails is managed by email service providers through other means, such as filters and algorithms designed for that purpose. Lastly, marking an email as important typically utilizes flags or priority settings rather than the BCC function.