For Five Years, You Wake Up Before the Alarm Is

Multiple Choice

For five years, you wake up before the alarm is set to ring each morning. This leads you to conclude that people have a built-in "alarm clock" capable of waking them up. From a science viewpoint, this conclusion

A) is science because it is based on real observations.
B) is science because it is predictive of what will happen tomorrow morning.
C) is scientifically valid because 5 years x 365 days is a large number of trials.
D) may not be valid because it generalizes about all people, and there may have been other variables that could awaken you without a built-in clock.
E) cannot be scientifically treated because it involves human behavior.