Answer:
A. Data from a study of skateboarding accidents published five years ago.
Step-by-step explanation:
When looking for reliable information, it's important to find a source that doesn't have any hidden agendas and is known to be loaded with data. An example of a reliable author or group is a university that conducted a study on the effects of skateboard accidents with concrete evidence like x-rays and hospital records. Data from a study of skateboarding accidents published within ten years.