For the psychopath, becoming adept as a serial killer requires perfecting this.

a. rationalization and unconscious pretense
b. rationalization and conscious pretense
c. conscious pretense
d. rationalization

A). rationalization and unconscious pretense

Explanation:

A serial killer has a controversial feelings, and a person adept with these ideas can't understand their acts as ordinary people does. Their behavior are justified and explained in a seemingly rational or logical manner to avoid the true explanation and then consciously considered tolerable - or even admirable and superior - by plausible means. And the unconscious pretense happens because of the lack of comprehension about socialization, and the inability to perform a true feeling.

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.