Which parenting style has been found to have the best outcomes for parent-adolescent relationships?

Suppose you have a 22-year-old friend who came to North America from Korea when he was 15 and then began to learn English. If he is like the participants in Flege's study on bilingualism, he will find that

a. he will develop trouble in Korean with verb tenses and the gender of nouns, but will maintain his Korean vocabulary. b. he will lose a substantial percentage of his Korean vocabulary. c. he will have difficulty mastering English vocabulary. d. he will master English grammar as well as a Korean speaker who learned English as a 10-year-old child, as long as they both have the same amount of U.S. education.

A researcher is able to conduct an experiment on study habits in his laboratory and he finds some exciting results. What is one possible shortcoming of using this method?

a. Results from laboratory experiments do not always generalize to real-world situations. b. Experiments do not provide evidence about cause-and-effect relationships. c. It is not possible to conduct experiments on issues such as study habits. d. Laboratory experiments do not control for confounding variables.