Researchers have found that people tend to ____ as little as possible

Typically, boys experience their first ejaculation fairly _____ in puberty, and girls experience their first menstrual period fairly _____ in puberty

A) early; early B) early; late C) late; early D) late; late

According to text, why do older adults typically keep their houses warmer than younger adults do?

a. They have more money and can afford to pay for heating expenses. b. They have diminished reserve capacity in their organ systems and lower body temperatures. c. Their muscles need more heat in the environment to work efficiently. d. Their memories are bad and they forget to turn the heat down when they come in from the cold.