[Q]: 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. No one that was emailed fell for the demand. 
[A]: It's impossible to say

[Q]: The royal tombs at Vergina were identified as the ancient capital of Aigai in the 1930s. A royal tomb identified as possibly Philip II of Macedonia, Alexander the Great's father, was found in 1977 by Manolis Andronikos. The royal tombs at Vergina were not identified as the ancient capital of Aigai until in the 1930s
[A]: Yes

[Q]: The 1974 Zhaotong earthquake occurred at 19:25 UTC on 10 May. It had a magnitude that was measured at 7.0 on the moment magnitude scale and 7.1 on the surface wave magnitude scale. It had a maximum perceived intensity of IX ("Violent") on the Mercalli intensity scale. The epicenter was located in Zhaotong prefecture in Yunnan province and it caused between 1,641 and 20,000 deaths. There was a difference of one tenth of a point between the two measured magnitudes on the two different scales.
[A]: Yes

[Q]: Prosecutors say they've found a second victim in the case of an El Cajon teen who was kidnapped to be forced into prostitution. Four suspects are already facing charges of human trafficking, robbery, sexual battery and pimping in this case. Prosecutors say they will file the new charges against the four later Wednesday. The four suspects have victimised at least two people
[A]:
Yes