James has decided that he is going to pull an "all-nighter" to study for his physics final examination tomorrow. In psychology terms, he is planning to engage in _____ practice

What is the most common active ingredient in marijuana?

a. LSD b. PCP c. THC d. LOB

Studies have found that students who learn to speak two languages will have

a. a lack of mental flexibility. b. weaker general language skills. c. better control of their attention. d. poor problem-solving abilities.