Apsychological condition that can lead to poor sleep is
a.
apathy
b.
impaired memory
c.
anxiety
d.
lack of restraint

A psychological condition that can lead to poor sleep is anxiety.

Anxiety can cause insomnia (unable to sleep or having trouble falling back to sleep) easily. The other options do not sounds right when being linked to poor sleep. Apathy means that you have a lack of interest in whatever. Impaired memory is linked to many different symptoms, but mostly forgetting past events and/or names. For the last one, lack of restraint - it means that somebody has no motivation to do whatever they are doing. 

Anxiety has symptoms such as causing sleeplessness. So it's C. Anxiety

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