Some of the emails had the subject line, "Think Twice." They were sent from a spoofed email address. The sender claimed to have had an associate plant a small bomb in the recipient's building and said the only way to stop him from setting it off was by making an online payment of $20,000 in bitcoin.

Based on that paragraph can we conclude that this sentence is true?
Think Twice was a warning.

Pick your answer from:
(a). Yes;
(b). It's impossible to say;
(c). No;
(a).