A) the runner's muscles have accumulated lactic acid.
A treaty designed to protect the ozone layer via phasing out the production of multiple substances responsible for the ozone layer depleting.
Answer:
A. double-blind
Explanation:
Based on the scenario being described within the question it can be said that the type of trial that she has joined is known as a double-blind study. This is a type of study in which individuals are chosen randomly for each clinical intervention and the results are not given to the researchers until after the trial. This also includes any and all information that may influence the researchers behavior or thoughts on the study.
Answer:
jet streams form when warm air masses meet cold air masses in the atmosphere
