Read the excerpt from "A Byte Out of History.”It’s a mystery, frankly. We’ve run down thousands of leads and considered all sorts of scenarios. And amateur sleuths have put forward plenty of their own theories. Yet the case remains unsolved.And what of some of the names pegged as Cooper? None have panned out. Duane Weber, who claimed to be Cooper on his deathbed, was ruled out by DNA testing (we lifted a DNA sample from Cooper’s tie in 2001). Kenneth Christiansen, named in a recent magazine article, didn’t match the physical description and was a skilled paratrooper. Richard McCoy, who died in 1974, also didn’t match the description and was at home the day after the hijacking having Thanksgiving dinner with his family in Utah, an unlikely scenario unless he had help.
Answer
A
The FBI has followed many leads and scenarios.
B
Several men were investigated as potential suspects.
C
Amateur detectives continue to investigate the case.
D
There is a DNA sample from Cooper’s tie.
Explanation
The excerpt says amateur sleuths have offered theories, but it does not say they continue investigating. It directly supports A by noting that investigators pursued thousands of leads and considered many scenarios, and B by discussing several men considered as Cooper. It also states that the FBI obtained a DNA sample from Cooper’s tie, so the best-supported choice is D: there is a DNA sample from Cooper’s tie.
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