Seasonal affective disorder (SAD) seems to be related to

a) low levels of thyroxine.
b) low levels of melatonin.
c) high levels of thyroxine.
d) high levels of melatonin.

d

Psychology

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According to Dr. Laaser, intimacy problems in a marriage are the result of addiction.

a. true b. false

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Units of language such as pre-, sound and -s are known as

a. phonemes. b. morphemes. c. syntax. d. semantics.

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