Question

question 2 of 20
which source would be most helpful in researching this question?
have helmet laws decreased the number of childhood head injuries?
a. the biography of a professional cyclist whose career ended after a head injury
b. a medical journal article titled \cause and treatment of childhood concussions\
c. a newspaper article titled
umber of concussions in counties with and without helmet laws\
d. a website featuring an online petition to enact helmet laws in every state

Explanation:

The research question is about the impact of helmet laws on childhood head - injury numbers. Option A is about an individual cyclist, not relevant to the overall impact of laws. Option B focuses on cause and treatment, not the impact of laws. Option D is about a petition, not data on the impact of laws. Option C provides data on concussions in areas with and without helmet laws, which is directly relevant to the research question.

Answer:

C. A newspaper article titled "Number of Concussions in Counties With and Without Helmet Laws"