Dr. Jones is conducting an experiment on how energy drinks affect performance,

she deliberately changes the drinks to produce a different effect on the participants.

What is Dr. Jones doing?

A.
Random assignment

B.
Double-blind procedure

C.
Experimental manipulation

D.
None of the above

for respect usually. some people might be little awkward if you meet or some would be different. usually   you dont love people when you meet them depends on the type of person.

hope this

no way! i don't want to spend my night being sick!

since you have not provided the options here i   am going to give you general overview about hormone.hormone are actually the part of endocrine system in our body and produced by the endocrine glands. the hormones act like a chemical messenger   within human body. once produce by the glands they   travel through the blood stream and reach at specific or target tissue and organs   which result in control of our body function. the hormones are specific in their work and work on only the targeted tissue or organ   . with the of hormone endocrine system regulate the heart rate , metabolism, our mood and   growth as well as the development and even the sleeping cycle etc. they actually are the messenger for body cell and organs .