According to several research studies of students who use the ideas in your text:
a. about twenty-five percent are successful.
b. about forty-five percent are successful.
c. about seventy percent are successful.
d. about ninety percent are successful.
Question 2
People who are addicted to alcohol:
a. are unable to quit because they are addicted
b. are able to quit only with professional help
c. are able to quit using self-modification techniques
d. are not able to quit because their problem is too serious