Answer:
c.Optional of
Explanation:
According to my research on different college structures, I can say that based on the information provided within the question the course entity of the college database would be optional of the department entity. This is because the college has many departments but only some offer courses, therefore the courses are dependant on if the department offers them or not (optional).
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Answer:
Due to lack of technology.
Explanation:
It took several centuries before the civilizations of the two hemispheres had communication because of lack of technologies that can make a bridge of communication between two hemisphere. People are not interested in research and having old wrong beliefs that prevent them from growth and development but due to renaissance movement people get rid of false and wrong beliefs and work for the advancement of technology which leads to communication between two hemisphere.
The major breakthrough in the study of dreams came in 1953 when researchers Eugene Aserinsky and Nathaniel Kleitman studied and discovered what happens when a person falls asleep.They found that the body enters into a psycho-physiological state in intervals of 90 minute cycles during sleep. This physiological state consists of heightened brain activity, Rapid Eye Movement (REM), increased breathing, a temporary paralysis of the body and genital engorgement. Through experiments, they confirmed that these physiological observations were the result of the person being in the dream state.
<h3>Answer:</h3><h2>Producers can generate instant sales by using websites.</h2><h3>Explanation:</h3>
A website is a necessary marketing tool -- and every manufacturer practices its site individually. Some practice it to produce instant income through e-commerce deals while others use it to create contacts, phone calls or physical spot talks. There is one idea that every manufacturer wants to achieve with its website: leveraging it to generate more growth.