If knowing the level of an independent variable received by a participant does not at all

Select any categories represented in this comment: "You should know better than to stare at that cripple."

A. emotion-packed phrase and biased language B. vulgarity and colloquialism C. vagueness and labeling D. semantics and dialect

Each of the following is recommended by sleep experts for coping with insomnia EXCEPT ______

a. maintaining regular bedtime hours b. avoiding sleeping late on weekends c. abstaining from drugs d. fighting insomnia when it occurs