C. Shang rulers expanded their kingdom by land purchases.
The commercial revolution which was the predecessor for the industrial revolution (which is widely known), had a major impact on daily life in general, but especially trading. The commercial revolution involved the creation of established and stable trading routes all around the world which traded in various materials (spice, silk, metals, etc.) all of this drastically affected daily life as well.
<span>The ventral stream, also known as the "what" stream, is the location in the brain that identifies exactly what is being heard, and the dorsal stream, also known as the "where" stream, is the part of the brain that recognizes where in space that the sound came from.</span>
Answer:Primary research
Explanation: Primary research is the process of researching that is doen by the individual itself or the people hired by him/her .It includes conduction of surveys, study , observation, raw data etc by the person on his own. Example - taking an interview of any political figure by person himself.
According to the question, primary research process is used by Wilson by hiring the researchers team professional tennis members and designers for conducting the research about the requirement of female players in tennis racquet. Thus, this research is done by primary source itself which makes it a primary research.