I would say trains, airplanes, cars, and list some more inventions that were made long time ago.
hope that this helps you. =)
Pretty sure its either a or b
Answer: i don't understand the language you used and it's kinda hard to read.
Explanation:
hypothesis: Students will do better on their next test if motivated by candy.
experiment: Giving candy to one group of students but not giving the candy to another group of students so that they can act as the control group. Analyzing which group did better on the test
