The Study Examining Infants' Ability to Do Simple Arithmetic That

Multiple Choice

The study examining infants' ability to do simple arithmetic that showed infants one or two dolls and then either added or subtracted a doll from behind a screen demonstrated that infants were surprised in which of these scenarios? Scenario A: A doll is placed behind a screen where another doll was initially present, and lowering of the screen reveals a single doll.
Scenario B: A doll is removed from behind a screen where two dolls were initially present, and lowering of the screen reveals a single doll.
Scenario C: A doll is placed behind a screen where another doll was initially present, and lowering of the screen reveals two dolls.
Scenario D: A doll is removed from behind a screen where two dolls were initially present, and lowering of the screen reveals two dolls.

A) both scenarios A and D
B) both scenarios B and C
C) scenario A only
D) scenario C only