Read the excerpt from "Dialogue Between Franklin and the Gout," and then answer the question.
"By observing the degree of heat obtained by different kinds of motion, we may form an estimate of the quantity of exercise given by each. Thus, for example, if you turn out to walk in winter with cold feet, in an hour's time you will be in a glow all over; ride on horseback, the same effect will scarcely be perceived by four hours' round trotting; but if you loll in a carriage, such as you have mentioned, you may travel all day and gladly enter the last inn to warm your feet by a fire. Flatter yourself then no longer, that half an hour's airing in your carriage deserves the name of exercise. Providence has appointed few to roll in carriages, while he has given to all a pair of legs, which are machines infinitely more commodious and serviceable. Be grateful, then, and make a proper use of yours. Would you know how they forward the circulation of your fluids, in the very action of transporting you from place to place; observe when you walk, that all your weight is alternately thrown from one leg to the other; this occasions a great pressure on the vessels of the foot, and repels their contents; when relieved, by the weight being thrown on the other foot, the vessels of the first are allowed to replenish, and, by a return of this weight, this repulsion again succeeds; thus accelerating the circulation of the blood. The heat produced in any given time depends on the degree of this acceleration; the fluids are shaken, the humors attenuated, the secretions facilitated, and all goes well; the cheeks are ruddy, and health is established."
In this excerpt, Madame Gout reasons with Franklin about the benefits of exercise by
A. reprimanding Franklin for eating and drinking too much at his friends' parties.
B. using scientific data to prove that exercise is an important part of being healthy.
C. making observations to compare the advantages of walking versus taking a carriage.
D. concluding that walking will keep Franklin warmer than riding in the carriage.
