To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) 1976 - This option is incorrect because the "@" symbol was not chosen for its use in email addresses in 1976.
Option B) 1972 - This option is correct because the "@" symbol was chosen for its use in email addresses in 1972. The symbol was selected by Ray Tomlinson, the inventor of email, to separate the local part of an email address from the domain name.
Option C) 1980 - This option is incorrect because the "@" symbol was chosen for its use in email addresses before 1980.
Option D) 1984 - This option is incorrect because the "@" symbol was chosen for its use in email addresses before 1984.
The correct answer is B) 1972. This option is correct because the "@" symbol was chosen for its use in email addresses in 1972.