<span>B. entertain help this help</span>
Answer:
"Without innovations in food production, the factories could not have grown so quickly. The trend quickened after 1860 and continued throughout the 21st century as well."
Explanation:
Because in the previous sentence it already stated the same thing. (PS I probably got this wrong)
The answer is c because it says in my engish book that the sentence will start with: AS , WHILE , AS LONG , ALTHOUGH , UNLESS , WHEN , AFTER , AS , IF , EVENTHOUGH