Why did most of the attacks happen?
Check List of Islamic attacks on wikapedia

(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 governor can not veto a referendum that the voters approve

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity