Answer:
______is the research design that allows cause-and-effect conclusions.
Explanation:
Answer:
The building of roads and canals in the United States in the early 19th century resulted in stronger economic ties between the East and the West.
Explanation:
The phenomenon that many refer to as the 'transportation revolution' is deemed to have taken place in the early 19th century. The Louisiana Purchase that happened in 1803 doubled the size of the nation and the War of 1812 surfaced the need for enhanced transportation and communication facilities in the interiors of the country.
In line with the same, many small and large construction projects of roads and canals were undertaken during this period which culminated in the formation of expanded networks of transportation. These networks served to connect the far east and the far west of the country and also enabled the development of healthy economic ties between the East and the West.
The correct option is A
The kingdom of Ghana emerged from the relatively small agro-pastoral settlements of the fourth century in the region known as Awkar. Between the years 750 to 800 a Mandé language people, known as the Soninké, united under Majan Dyabe Cisse or Dinga Cisse, the first warrior king, dominated Awkar (even today the surname Cisse is prominent in the politics of Mauritania and Mali). The Soninké were then the founders of the empire of Ghana that from the VIII century controlled the trans-Saharan trade. The Ghanas conquered numerous cities and annexed neighboring territories. Its apogee came in the ninth and tenth centuries.
Answer:
The correct answer is <u>C) The Placebo Effect</u>
Explanation:
In medical terms, a placebo effect occurs when a patient is given an inactive medicine that does not work but the patient has no prior knowledge of this. However, due to their own expectations, slight improvements in their conditions are noted which are mostly attributed to the patient's own positive belief in the medicine.
The Placebo effect is well-documented. Positive exceptions has such a powerful impact on the outcome that scientific research, always includes a separate section to measure the effect of a medicine compared to a placebo group.