Read the paragraph. the city is proposing a long-overdue bike-helmet law that would make wearing a helmet mandatory for all cyclists. this law will protect cyclists of all ages from potential injury. many studies have shown that wearing a bike helmet can prevent serious injury and death. a study in 2009 showed that 91 % of people who died in bike injuries were not wearing helmets. a similar study in new york found that 74 % of bike crashes involved a head injury, and almost all cyclists who died, 97%, were not wearing a helmet. some people claim that wearing a bike helmet is uncomfortable. yet new helmets are lightweight and designed with air vents so you will not overheat while wearing one. in conclusion, a bike-helmet law would make biking safer and, by extension, more enjoyable. fill in the missing transitional words. a. for example, in addition, however b. on the other hand, for example, this means c. for instance, in another example, for the most part d. this means, one example, in conclusion