Which civilization is known for recognizing the numeral zero?
A. Olmec
B. Aztec
C. Maya
D. Zapotec

answer; (true);

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.

answer; occurs if the conflict is recognized logically and intellectualized;