Marcy is given her choice of two Hershey bars, one of which has been broken into four pieces, and one that is intact; Marcy chooses the broken candy bar, believing that it has more candy. According to Piaget, Marcy is having problems with what concept

Egocentrism

Explanation:

Egocentrism involves an individual believing his/her views are the most significant and those of others are irrelevant.

Marcy is said to have been given her choice of two Hershey bars, one of which has been broken into four pieces, and one that is intact and she chooses the broken candy bar, believing that it has more candy when the bars are known to contain the same amount of contents explains egocentricity.

unless they converted, many non-christians (mainly jews and muslims) were persecuted

abu bakr, was a senior companion and—through his daughter aisha—a father-in-law of the islamic prophet muhammad. abu bakr became the first openly declared muslim outside muhammad's family. abu bakr served as a trusted advisor to muhammad.