Which source has the appropriate qualifications to be a credible soure of information about the city streets?

Question

with the most car-pedestrian accidents?A.data collected on a personal blog B.a conversation with a personal injury lawyer C.a letter to the editor by an injured pedestrian D.data collected by the local police department.

Answer 1

Think about it.  Which of those four deal with car-pedestrian accidents on a daily basis?  Which of them will hear about every car-pedestrian accident in the city?  Which of them has no particular reason to exaggerate the extent of the injuries in such an accident?  Which of them has no personal stake in the matter?