After reviewing a recent survey into parenthood, psychologists claimed that the majority of parents believed that they would probably be happier without children although many stated that they will feel less satisfied with their lives.

(A) After reviewing a recent survey into parenthood, psychologists claimed that the majority of parents believed that they would probably be happier without children although many stated that they will

(B) After reviewing a recent survey into parenthood, psychologists claimed that the majority of parents believe that they would probably be happier without children although many stated that they would

(C) Psychologists, having reviewed a recent survey into parenthood, claimed that the majority of parents believed that they will probably be happier without children although many stated that they would

(D) Having reviewed a recent survey into parenthood, psychologists claimed that the majority of parents believed that they would probably be happier without children; nevertheless, many stated that they would

(E) Upon reviewing a recent survey into parenthood, psychologists claimed that the majority of parents believed that they would probably be happier without children although many state that they would

OA D

Source: Economist Gmat