Need help with these economic questions, thanks!

Which of the following is most likely to shift the demand curve for electricity to the left? O consumers becoming more energy conscious. C) an increase in the price of natural gas, a substitute source of energy. O a decrease in the price of electricity. 0 an increase in income. An economic theory claims that a rise in gasoline prices will cause gasoline purchases to fall, Ceteris paribus. The phrase "Ceteris paribus" means that: O other relevant factors like consumer incomes must be held constant. O the theory is widely accepted but cannot be accurately tested. O consumers' need for gasoline remains the same regardless of the price. O the gasoline prices must first be adjusted for inflation