In describing the first schemes of sucking and grasping as central to the sensorimotor stage, Piaget is expanding upon:, (A) Freud's Oral stage
(B) Baumrind's parental style
(C) Maslow's Being Need of self-Actualization
(D) Kohlberg's pre-conventional stage
(E) Erikson's Trust vs. Mistrust stage

(A) Freud's Oral stage

Explanation:

Oral stage: In psychology, the term "oral stage" is considered as the first stage in the psychoanalytic theory which was proposed by one of the greatest psychologists named Sigmund Freud, in which he has mentioned five distinct stages. At this stage, the development of an infant goes around the "oral gratification" i.e., the mouth of a particular infant in his or her "primary erogenous zone". The given stage starts from the birth of an infant and lasts through 18 months of age.

In the question above, the given statement represents the "oral stage".

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