What is the best replacement of the underlined word the sentence below?
By looking at further analysis, scientists rely on formulas to arrive at conclusions for their research in math.
a. tools
c. books
b. calculations
d. methods

Please select the best answer from the choices provided

A
B
C
D

The author uses dialogue in this excerpt mainly

Eter lives in a beautiful region. peter and other residents of his region use water from the river that flows through their region. recently, mark industries decided to set up their chemical plant near that river. peter realized that the waste from the chemical plant would pollute the river. he decided to seek a legal ordinance that would restrict the use of land near that river for specific use only. which type of zoning will peter and his region?

Give an example of a situation in which an individual's pursuit of economic self-interest may not benefit but instead harm the rest of society