The Difference Between the Schemes of Substage 1 Infants and Substage

Multiple Choice

The difference between the schemes of substage 1 infants and substage 2 infants is that

A) substage 1 infants use schemes for the pleasure of using them, whereas substage 2 infants use schemes to explore the environment.
B) the schemes of substage 1 infants are limited to single sensory modalities whereas the schemes of substage 2 infants involve the coordination of input from more than one modality.
C) substage 1 infants can reproduce activities they happen upon by chance, whereas substage 2 infants can employ means-ends analysis to produce a desired effect.
D) when trying to solve problems, substage 1 infants use initially successful solutions repeatedly, whereas substage 2 infants engage in active trial and error.