Today's supply curve for gasoline could shift in response to a change in a. today's price of gasoline. b. the expected future price of gasoline. c. the number of buyers of gasoline. d. All of the above are correct.

d. All of the above are correct.

Explanation:

The supply of a product represents the amount for a product a manufacturer is willing to sell at the market at a particular price at a point in time. Since manufacturers are primarily profit-focused, the supply of a product is influenced by the price of that product as well as the demand for the product.

Hence, a manufacturer can vary the amount of product supplied to the market  depending on the short term price and long term price projection as well as the demand for that product.

The correct option is d.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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