What are some ways that African kingdoms established trade with other civilizations? Select all answers that apply. 1. by creating trade laws for other civilizations to trade peacefully
2. by creating an extensive network of trade route on the Indian Ocean
3. by using the slave trade to extend trade to other civilizations
4. by conquering new civilizations to establish trade with the native people
5. by beginning trade with other merchants in the Arabian Peninsula

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.

Why was the leo frank case important ?

Which statement about spreading knowledge of diseases and health around the world is correct?