What explains the increase in london’s population from 958,863 in 1801 to 4,776,661 in 1881? a. the agricultural revolution led to increases in agricultural production and resulted in a greater rural population. b. widespread disease and poor sanitation severely impacted london’s population in the early 1800s: it did not rebound until the late 1800s due to improved nutrition. c. the industrial revolution created more jobs and resulted in a greater urban population. d. immigration to london from new york city sparked a massive population increase.