What is the memory task for most of the items in a multiple-choice test, such as the one you are taking?

Which of the following phenomena casts doubt on the

suggestion that undeveloped parts of the brain are solely responsible for the teenage proclivity to act in unreasonable and irrational manners? A) fMRI readings of impulsive teenagers have been found to be identical to fMRI results in non-impulsive teenagers. B) Twin studies have not found a high concordance of teenage acting out between monozygotic twins. C) Impulsive behaviors do not routinely appear in adolescents in non-Westernized countries. D) The use of medications designed to "calm down" impulsive teenagers has been generally ineffective across most research studies.

A ____ is a situation that exists naturally but that provides interesting scientific information to the perceptive observer

a. holistic experiment b. natural experiment c. random experiment d. quasi-experiment