Which factor best accounts for the trend shown on the bar graph? Select one:

an increase in the availability of cheap Western lands

a ban on foreign immigration to the United States

the debate over the institution of slavery

an increase in the number of jobs available in cities

Yo momma is so fat that Dora can't even explore her!

Explanation:

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on