I believe the answer is: testing effects
Testing effects refers to the perception long term memories tend to be increased when our brain is dedicated to retrieving a certain type of information over and over again. When studying, this tend to make people become bias and overconfident after repeating a certain topic, making them believe that they do not need to study the topic again before test.
B would the correct answer
Answer: B. the Pacific Ocean
Explanation: The United States has 16 territories, 2 of which are disputed or 4 according to some texts, with the remaining being undisputed territories of the United States. From the world map attached, majority of these territories are located in the Pacific including American Samoa, Guam, Northern Mariana Island which are all inhabited territories. The other two other inhabited islands are located in the carribean sea ; they are Puerto Rico and U. S virgin Islands. Of the uninhabited territories, Baker Island, Howland Island, Jarvis Island, Kingman Reef, Palmyra Atoll are all located in the Pacific Ocean.
'The Four Great Inventions of Ancient China' refers to paper, gunpowder, printing, and the compass. These four great inventions greatly promoted the development of China's economy, politics, and culture.