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:

The correct answer is A only.

Let us analyze each statement step-by-step to understand why only Statement A is true:

Statement 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.
Bcc stands for Blind Carbon Copy. When you send an email and put an address in the Bcc field, that recipient receives a copy of the email, but their email address is hidden (concealed) from all other recipients listed in the To, Cc, or Bcc fields. Therefore, Statement A is true.

Statement B: Phishing is a malicious program installed on a system that stays concealed avoiding detection.
Phishing is not a program installed on a system. Instead, phishing is a social engineering attack where attackers deceive people into revealing sensitive information (like passwords or credit card numbers) through fraudulent emails, messages, or websites. The description in Statement B matches malware like spyware or rootkits, not phishing. Therefore, Statement B is false.

Statement C: Spamming is an attempt to acquire sensitive information for malicious reasons, by masquerading as a trustworthy entity.
Spamming is the practice of sending unsolicited, bulk messages (usually advertisements) to a large number of recipients. The act of attempting to acquire sensitive information by masquerading as a trustworthy entity is the definition of phishing, not spamming. Therefore, Statement C is false.

Since only statement A is correct, the correct option is A only.