Historians believe that the invention of the cotton gin had which of the following effects?
a.
an increasing number of people moving to the cities
b.
a decreasing number of privately owned farms
c.
the expansion of slavery in the south
d.
the migration of african americans to the north

How can misinformation interfere with memory? how might the memory of an eyewitness be affected by testing if they receive misinformation?

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a study of twenty 4th grade classrooms in which researchers ask the schools to systematically vary the time of day reading is taught, and collect weekly assessments of reading comprehension for each child over a three-month period.the collection of data, by a playground designer hired by the superintendent of schools, about the physical dimensions of school playgrounds, presence of fencing, and the kinds of equipment currently provided.a feasibility study for implementing a year-round school program, focusing on economic issues such a facilities utilization and transportation costs.an analysis of aggregate data comparing statewide high school graduation rates provided by the state department of public instruction, using county tax information.

Describe two reasons that cities developed along rivers during the industrial revolution. for full credit, your response must be at least 2 complete sentences.