<em>You can not change the past.You can not change the future.You are able to change the present.</em>
Answer:
Both scenario A and D.
Explanation:
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 A: A doll is placed behind a screen where another doll was initially present, and lowering of the screen reveals a single doll and D: A doll is removed from behind a screen where two dolls were initially present, and lowering of the screen reveals two dolls.
Answer:
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