Which details support the viewpoint that serious cycling is not safe for people under the age of twenty-one? check all that apply. a. “‘the spinal column is particularly apt to be injured by too early riding.’” b. “in 1896, the journal of the american medical association published a cautionary article by dr. william c. krauss of buffalo, new york, that reported the curious case of a 37-year-old man with ‘acute dilation of the heart.’” c. “he went on to warn that the hearts, muscles, and nervous systems of riders also might be adversely affected if they started cycling too early.” d. “‘it must be distinctly understood that anything in the way of racing or speed competition on cycles must be injurious to any woman.’” e. “smith blamed the bicycle for the downfall of women's health, morals, and religious devotion.”