What practice of the catholic church that led martin luther to break with the church? why did he view this practice so negatively?

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

President franklin roosevelt most likely supported lawrence camp in the senate race against walter george and eugenes homage in 1938 because he

The areas with the highest population density in europe are most likely to be