An email message has been sent from A to B, with Cc to C and D, and Bcc to E and F. Which one of the following statements is true?

E and F are both blind carbon copy recipients, and Bcc entries are hidden even from other Bcc recipients, so E does not know that F was also sent the message.

The first choice is wrong because F, though in Bcc, can still see the To and Cc names, so F does know C received it.

The second choice is wrong because C, in Cc, can see that the other Cc recipient D received the message.

The fourth choice is wrong because D, in Cc, can see the To recipient B and knows B received it.

A Bcc recipient sees everyone in To and Cc but no one sees who is in Bcc.

This is why Bcc is used to copy someone privately without the other recipients learning of it.