Sonja Used to Work Out Five Days a Week When

Sonja used to work out five days a week when she was in her late teens. In her twenties, she worked out three days a week. Now she is in her forties, and she seems to work out only when she has the time. Which of the following trends does Sonja's pattern of behaviour illustrate?

A) Many health-impairing habits creep up on us.
B) People often underestimate the risks associated with their own health-impairing behaviours.
C) The risks associated with health-impairing habits tend to lie in the distant future.
D) Many health-impairing habits involve activities that are quite pleasant at the time.