In a classic series of studies that illustrate goodness of fit in action, Dutch researchers provided sensitivity and responsiveness training for some mothers of irritable infants, which resulted in greater levels of ________ among the children

Which is the best example of a "social convoy"?

a. a newly married couple b. Generation X c. several adult lifelong friends d. a retired individual who plans to move to a community with other retirees

The ____ principle of counting states that there must be only one number name for each item counted

a. one-to-one b. stable-order c. habituation d. cardinality