Manang
A noted psychoanalyst claims that the causes of mental illness are mainly environmental – extreme poverty, lack of adequate parenting, and sexual abuse –
and chemical imbalances rarely.
A) and chemical imbalances rarely
B) and chemical imbalance being rare
C) with chemical imbalance as rare
D) chemical imbalances a rarity
E) with chemical imbalance as a rarity
The part in the hyphen can be ignored. The rest of the sentence should be one whole.
A noted psychoanalyst claims that the causes of mental illness are mainly environmental and chemical imbalances rarely.
The claim is that causes of mental illness are environmental (some examples listed out) and that chemical imbalances lead to mental illnesses rarely.
A) and chemical imbalances rarely
With "and", we would need a complete clause.
e.g. ... and chemical imbalances are rare...
B) and chemical imbalance being rare
"being" is used to express a temporary state.
C) with chemical imbalance as rare
"rare" is an adjective. You need a noun with "as" here - "chemical imbalance as a rarity"
D) chemical imbalances a rarity
A noted psychoanalyst claims that the causes of mental illness are mainly environmental chemical imbalances a rarity.
Connector that connects "chemical imbalances" to the rest of the sentence is missing.
E) with chemical imbalance as a rarity
Grammatically fine.
Answer (E)