Answer:
Im adding my answer C almost never :)
Explanation:
Answer: food not cooked past a certain degree, expired food and Bactria from meet that was not cleaned up properly
Explanation:
Jim sprained his bicep tendon
Answer:
A longitudinal study
Explanation:
A longitudinal study can be used to discover relationships between variables that are not related to various background variables. This observational research technique involves studying the same group of individuals over an extended period.