Select the Letter of the Correct Answer for Each of the Following

Multiple Choice

Select the letter of the correct answer for each of the following questions. Select the number of the topic sentence in the paragraph below.
(1) Within 20 minutes of quitting smoking, an ex-smoker's blood pressure and pulse rate return to normal. (2) Within eight hours, oxygen levels in the blood increase, and carbon monoxide levels decrease. (3) Forty-eight hours after quitting, the ex-smoker's senses of smell and taste return to normal. (4) By three months after quitting, the ex-smoker's circulation will have improved, and his or her lung function will have increased by as much as 30 percent. (5) A year after quitting, the ex-smoker's risk for heart disease is slashed by half. (6) The risk for lung cancer is cut in half within five years of quitting. (7) It's clear that the longer an ex-smoker goes without cigarettes, the healthier he or she becomes.

A) Sentence 1
B) Sentence 2
C) Sentence 7