How many tablets should one take before he goes to sleep?
A．one
B．two
C．one and half
D．three
How many tablets should one take before he goes to sleep?
A．one
B．two
C．one and half
D．three
B解析：本题的依据句为“For maximum nighttime and early morning relief，take two tablets at bedtime.”B选项可以得到确认。
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