Problem: There is a long history of martial arts competition in Fujian Province of China. Interestingly, one can also place bets on competitors. David is a martial arts enthusiast, watching every martial arts movie he can find. This year David and his friend John is visiting the Fujian Province to see the martial arts competition. There are two rounds of competition, round A and round B. Round A competitors would display southern Chinese martial arts while round B competitors would display northern Chinese martial arts. In which round competitors would be farther from their opponents, round A or round B?

A: round B

Problem: A team of scientists studied two groups of mice. Group C was exposed to carcinogens, while group N was not. Which group of mice had more random errors in genes?

A: Group C

Problem: Paul and Dirk were studying the human digestive system. paul studied more about the stomach, while Dirk studied more about the jejunum. Which student read less about villi containing many capillaries?

A: Paul

Problem: Sam is going to visit his grandfather. His grandfather lives in a retirement home and can barely take care of himself anymore. Will Sams grandfather's risk of getting cardiovascular disease have increased or decreased as he got older?

A:
increased