Which best describes the author’s purpose in "Dwaina Brooks”? to inform readers about a historical event
to persuade readers of a specific point of view
to instruct readers about how to complete a task
to inspire readers with a story about kindness

answer; ///the (iroquois) cultures was made up of several groups, who spoke a common language

answer; ok in rural area most people depend on private transportation(cars),pick up truck,donkey and buggy: ),and urban people can walk or ride public transportation,bus,train cab,uber.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.