Question

question 11 9.1 pts as shown in figure 10, why did fuel ethanol consumption flatten out when it reached 10 percent of motor gasoline?

• manufacturers do not wish to produce more ethanol, a situation represented by the downward sloping portion of the demand curve for fuel ethanol.

• manufacturers do not wish to produce more ethanol, a situation represented by the nearly vertical portion of the demand curve for fuel ethanol.

• regulators limited ethanol to 10 percent of gasoline mixtures to prevent vehicle engines from degrading, a situation represented by the downward sloping portion of the demand curve for fuel ethanol.

• regulators limited ethanol to 10 percent of gasoline mixtures to prevent vehicle engines from degrading, a situation represented by the nearly vertical portion of the demand curve for fuel ethanol.

Explanation:

To solve this, we analyze each option:

1. The first two options blame manufacturers, but the flattening is more likely due to regulatory limits (to protect engines) rather than manufacturers' wishes.
2. A nearly vertical demand curve segment represents a situation where quantity demanded changes little with price (inelastic), which fits a regulatory limit (e.g., ethanol capped at 10% regardless of price factors). A downward - sloping curve is elastic (quantity changes with price). So the correct option should involve regulators limiting ethanol to 10% (to prevent engine degradation) and a nearly vertical demand curve portion.

Answer:

D. Regulators limited ethanol to 10 percent of gasoline mixtures to prevent vehicle engines from degrading, a situation represented by the nearly vertical portion of the demand curve for fuel ethanol. (Note: Assuming the last option is D; if the options are labeled differently, adjust the label but keep the text. The key is the regulatory limit and the nearly vertical demand curve explanation.)