Fast-food restaurants make up 45 percent of all restaurants in cantaria. customers at these restaurants tend to be young; in fact, studies have shown that the older people get, the less likely they are to eat in fast-food restaurants. since the average age of the canatrian population is gradually rising and will continue to do so, the number of fast-food restaurants is likely to decrease. which of the following, if true, most seriously weakens the argument? (a) fast-food restaurants in canatria are getting bigger, so each one can serve more customers. (b) some older people eat at fast-food restaurants more frequently than the average young person. (c) many people who rarely eat in fast-food restaurants nevertheless eat regularly in restaurants. (d) the overall population of canatria is growing steadily. (e) as the population of canatria gets older, more people are eating at home.