Multiple choice: select the best answer and click "submit."

which of these could most likely be used to identify a person?

a. email address
b. favorite mobile app
c. social security number
d. hair color

its bassicly asking u   to answer it in your own words does that

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.