"<span>b. Rotavirus" would be the best option from the list, since this virus leads to extreme dehydration, which can be deadly in many developing countries due to a lack of clean water. </span>
The maintenance of transportation and communication networks, the distribution of land according to the equal-field system, and the reliance on a
<span>bureaucracy of merit are all reasons that the "D. Tang" dynasty succeeded, since this allowed them to be highly competitive in a variety of markets. </span>
I think it's A or C not quite sure but i hope you do well.