If angie decides to start an exercise program by walking one mile 3 days a week, she has
a. set a reasonable goal
b. training to her program
c. feedback to assist her
d. set back

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.