The effectiveness of a drug on a measurable variable, such as drowsiness, may depend on if the level for that variable is higher or lower at the time of the drug’s administration.
A.if the level for that variable is higher or lower at the time of the drug’s administration
B.if the level of that variable, higher or lower, is at the time of the drug’s administration
C. the level of that variable at the time of the drug’s administration
D. whether the level for the variable at the time of
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A.if the level for that variable is higher or lower at the time of the drug’s administration
B.if the level of that variable, higher or lower, is at the time of the drug’s administration
C. the level of that variable at the time of the drug’s administration
D. whether the level for the variable at the time of
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