Stephanie's doctor reduces the dosage of her daily medication when she begins trying to get pregnant. The principle behind this action states that

A. egocentrism: Egocentrism is the child’s difficulty seeing others’ viewpoints; covering toys because they might be cold reflects attributing internal states to objects, not perspective-taking failure.
B. operations: Operations are internalized, reversible mental actions (Piaget); this behavior is not demonstrating logical operations.
C. animism: Animism is attributing lifelike qualities or feelings to inanimate objects (e.g., thinking a toy can feel cold), which fits this example.
D. conservation: Conservation is understanding that quantity remains the same despite changes in appearance; it’s unrelated to attributing feelings to toys.

A. slow-to-warm-up: Chess & Thomas described this temperament as shy, slower to adapt to change; it’s relatively common but not the most frequent type.
B. uninhibited: “Uninhibited” is a term used by Kagan (inhibited vs. uninhibited) rather than Chess & Thomas’ taxonomy, so it’s not the expected label here.
C. easy: The “easy” temperament (generally positive mood, regular routines, adaptability) was the most commonly observed category in Chess & Thomas’ work.
D. difficult: The “difficult” temperament (irregular routines, negative mood, intense reactions) occurs less often than the “easy” type.