In the context of Information and Communication Technologies (ICT), which of the following statements is/are true?

A. In an email system, Bcc : allows the sender of a message to conceal the recipient entered in the Bcc : field from the other recipients.

B. Phishing is a malicious program installed on a system that stays concealed avoiding detection.

C. Spamming is an attempt to acquire sensitive information for malicious reasons by masquerading as a trustworthy entity.

Choose the correct answer from the options given below: