Under 46 CFR §16.250, a marine employer's decision to require reasonable cause drug testing of a crewmember must be based on which of the following?

1. A. A written complaint from another crewmember alleging drug use
2. ✓ A reasonable and articulable belief based on direct observation of specific, contemporaneous physical, behavioral, or performance indicators of probable useCorrect
3. C. Suspicion arising from the crewmember's prior drug test history
4. D. An anonymous tip received by the vessel's owner or managing operator