Which of the Following Statements Is True About the Effect

Which of the following statements is true about the effect of advertising on prices?

A) In industries subject to government price regulation, advertising has historically had no effect on prices.
B) Advertising affects prices of all products regardless of price regulation by the government.
C) Advertising makes generic products costlier.
D) Advertising often contributes to rising prices as it eliminates competition.
E) Historically, advertising has had significant effect on prices of agricultural products.