Astudent researcher decides to test whether personality affects students' perceptions of the quality of instruction at their school. before the student officially administers her test to the entire student body, she conducts a trial run with 10 students in her psychology class. this trial run is called a study.

How did the mountains on the oregon trail influence the timing of pioneers’ travels? a.) the pioneers wanted to avoid times when there was snow in the mountains. the pioneers wanted to spend as much time as possible enjoying the mountain scenery. b.) the pioneers crossed the mountains in late fall when the trees were bare and the views were good. c.) the pioneers were rugged people who were not impacted by the terrain they crossed at any time.