A VARIABLE is used to represent an unknown number.
It's false because that teacher used someone's content without getting the consent of the owner which can also be referred as a unethical work.
A/b testing is comparing two versions of a web page to see which one performs better
Answer Research is defined as the creation of new knowledge and/or the use of existing knowledge in a new and creative way so as to generate new concepts, methodologies and understandings
