Which of the following statements about tobacco products is true?
a. tobacco products contain over 4,000 different chemicals.
b. all chemicals found in tobacco products are carcinogens.
c. cigarettes are the least used tobacco product.
d. tobacco products are difficult to obtain.

Which statement is false? a. an extinction burst is the complete cessation of the target behavior after the extinction procedure has started. b. extinction procedures should not be used with behaviors that cause serious injury to the subject. c. if the behavior analyst does not have the ability to control the subject's access to reinforcement, an extinction procedure should not be implemented. d. spontaneous recovery of the target behavior will be short-lived, as long as the extinction procedure remains in effect