Before jackie left for college, she told her friend lisa that she thought sororities were filled with snobs and that she would never consider joining one. but during jackie's first week on campus, she was approached by a sorority member who invited her to a social function and encouraged her to pledge. after jackie attended the party, she told lisa, “sororities do a lot of good things for the community. they're really service organizations.” jackie's change in attitude to match her behavior reflects what concept?

cognitive dissonance

Explanation:

cognitive dissonance occurs when we have inconsistent thought/opinion toward a certain principle or situation.

Before entering college, the initial perception that Jackie have toward sororities was most likely influenced by media and TVs. After actually knowing about it, she start to change her perception that resulted in the  cognitive dissonance.

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.