A patient complained of feeling constantly fatigued. It was determined

Premise: 1. A patient feeling constantly fatigued.
2. Patient Sleeping only for four to six hours per night.

Conclusion: Less Sleep is contributing to the patient's condition
Paradox: The patient was not advised to sleep more.

(A) The shorter one's sleep time, the easier it is to awaken from sleeping.

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Can you please elaborate on why option B is incorrect? Not clear
Out of Scope - Ease of waking up is not the issue

(B) The first two hours of sleep do the most to alleviate fatigue.
Patient is already sleeping for 4 to 6 hours every night. Therefore, constant feeling of Fatigue means that even though most of the fatigue is alleviated, patient still need more sleep. Hence, the paradox is not resolved.

(C) Some people required less sleep than the eight hours required by the average person.
This patient IS sleeping for less than 8 hrs and still feeling fatigued. Therefore, the current patient is nor one of those people.

(D) Most people who suffer from nightmares experience them in the last hour of sleep before waking.
Out of scope - We are not concerned about what happens in the last hour of sleep before waking.

(E) Worry about satisfying the need for sufficient sleep can make it more difficult to sleep.
If true, it would create a vicious circle. Less Sleep -> Fatigue -> Solve by Sleeping more -> More worry about Sleeping -> Difficulty Sleeping -> Less Sleep -> ...