Which of the following types of norms represents measurement on an interval level?

Jenna cries when her mother leaves her with her babysitter. Jenna is showing

A. anger against the stranger. B. separation protest. C. emotion regulation. D. stranger anxiety.

When a baby is frightened or startled by a loud noise or by the sensation of falling, she will extend her arms out in a reflexive fashion. Though the exact purpose of this reaction is not well understood, it is called the __________ reflex

a. extension b. Moro c. Babinski d. withdraw