________ refers to a level of consumption of a substance leading to marked difficulties in everyday life, work, and social relationships

Eight-month-old Darius will probably smile and laugh more

A) when interacting with familiar people. B) when surprised. C) at a friendly stranger with a novel face. D) at a stimulating toy.

Janet wished she went to college instead of taking a job as an administrative assistant in her early twenties. Preston always wanted to be a teacher, but his father would only pay college tuition if Preston majored in engineering

In midlife, Preston went back to college and obtained a degree in elementary education, whereas Janet continued working as an administrative assistant. Compared to Preston, Janet will probably A) report more life satisfaction. B) be higher in self-acceptance. C) be less stagnant. D) experience poorer physical health over time.