Researchers who study the process of reading in children have discovered that better readers make smoother eye movements across the page (e. g., there is a positive correlation between reading skill and the smoothness of the eye movements). which of the following is a possible cause of this correlation between smooth eye movements and reading ability?

a. all of these options are possible causes of the correlation.
b. having good reading skill allows a child to make smooth eye movements.
c. some third factor might cause both smooth eye movements and improved reading ability.
d. the ability to make smooth eye movements improves reading ability.

In 1914, alabama produced 1.7 million bales of cotton, but three years later produced only 515,000, bales. meanwhile, in georgia, 5.2 million acres of land was dedicated for cotton production in 1914, but by 1923 there were just 2.6 million acres used for growing cotton. all of this was the result of the work of a tiny insect: the boll weevil. alabama and georgia first felt the effects of the boll weevil at different times. what would account for this difference in timing? a) the infestation moved from west to east. b) the infestation moved from east to west. c) georgia had better ways to deal with the problem. d) alabama was further from the insect's point of origin.