When does stranger anxiety occur?

Which of the following best describes the relationship between a person's brain size, and his or her intelligence?

A) There is no relationship between brain size and intelligence. B) Brain size is correlated with intelligence, but the relationship is complicated and poorly understood. C) Large brain size is a consistent predictor of high intellectual ability. D) Small brain size is a consistent predictor of high intellectual ability.

What method of problem solving guarantees a solution?

a. heuristic b. algorithm c. trial-and-error solution d. insight