The active ingredient in the first toothpaste approved by the ada was

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity

the ottoman empire was dwindling and two large to manage

explanation:

i think the answer is   b.