What conclusion is supported by the information shown on this graph? during the 1920s, the american economy was vulnerable to periodic crises. The prosperity of the 1920s was based on increases in government deficits. Economic growth during the 1920s was helped by increased consumer spending. During the 1920s, the disposable income of american households decreased.

Which of the following ideas did greek philosopher democritus contribute to the atomic theory? a. each object is made up of one atom, which varies in size from very small to very large. b. matter is composed of only one kind of particle, which can be easily destroyed. c. every element has a specific type of atom, which remains the same size in all forms of matter. d. all matter is composed of small particles, which combine to make larger objects.