How has european union has positively affected the trade in europe?

In which research method does a researcher change the value of one variable to determine how the change affects another variable? a. experiment b. observational research c. survey d. case study

The second westward surge reached the: mississippi river, appalachian mountains, oregon territory

Choose the best example of an indirect confrontation for the following situation: peter, a local school board member hired john whom owns a local print shop to make custom t-shirts for his son's basketball team, the ravens. they are about to play their final game of the year and are having a party to celebrate their semi-finalist rankings. unfortunately, the printer made a mistake and printed on red/blue shirts instead of black/blue which are the team's actual colors. peter explains to john that the team's colors are black/blue instead of red/blue and asks john what he thinks they should do. peter explains to john that the team's colors are black/blue and demands that john re-print the shirts on the correct colors. peter agrees to take the red/blue shirts but then posts a negative yelp review on john's business. peter agrees to take the red/blue shirts but tells everyone he can in the school about the incident and tells them not to buy from john. peter rejects the shirts and files a lawsuit to attempt to recover the down payment he made to john.