Email addresses in the ______ fields are visible to all recipients. Email…

Concept: Every email header field has a fixed visibility rule: To and Cc addresses are broadcast to every recipient of the message, while Bcc (blind carbon copy) exists so its recipients are never revealed to anyone else on the email, not even to other Bcc'd recipients.

• To: primary recipient(s); addresses are visible to everyone who receives the email.

• Cc (carbon copy): secondary recipient(s); addresses are equally visible to everyone.

• Bcc (blind carbon copy): recipient(s) added privately; their addresses are hidden from every other recipient.

Application: The question asks which field(s) are broadcast to everyone (first blank) and which single field is concealed (second blank). Since To and Cc share the same open-visibility behaviour and Bcc is the only field built to hide its recipients, the fields visible to all recipients are To and Cc, and the field hidden from other recipients is Bcc.

Cross-check: Contrasting the near-miss pairings:

• Moving Bcc into the visible group contradicts its entire purpose: Bcc is deliberately concealed, not broadcast.

• Moving Cc into the hidden group is also wrong: Cc behaves exactly like To and is shown to every recipient.

• Dropping Cc out of the visible set altogether still misses the point: Cc is broadcast just like To.

So, addresses in To and Cc are visible to everyone, while addresses in Bcc are hidden from other recipients.