Which event took place during the Copernican revolution, when most people started to believe in a heliocentric model of the solar system? Aristotle developed his model of the solar system. Copernicus rediscovered Aristarchus's heliocentric model. Kepler's laws of planetary motion. Newton's theories of gravity were dismissed and considered invalid.

Of the following, which statement or statements accurately reflect a way in which credit can be safer than cash? i. if your credit card gets stolen, you can cancel it and get your money back. ii. it is harder to lose a single credit card than a large number of bills. iii. if a merchant does not honor the agreement, you can call the credit company and dispute the charges. a. i and iii b. ii only c. iii only d. i, ii, and iii