The famous WXYZ band is about to embark on the international tour that it performs once every 3 years. Since the last tour, an oil crisis led to global inflation which has caused increases in the prices of concert tickets, averaging at 6%. Therefore, in accordance with this trend, fans that wish to calculate how much they will spend on tickets to a concert in the upcoming tour can simply increase the price of a ticket to a concert from the last tour by 6%.
The above conclusion is properly drawn if which of the following is assumed?
(A) Because oil is a vital raw material in an abundance of industries, it can affect the prices of consumer products or services.
(B) Global inflation does not necessarily result in the cancellation of entertainment events.
(C) An inflation trend can affect one country one way, and another country another way.
(D) A concert ticket price includes a tax paid to the cultural ministry of a specific country.
(E) Following the oil crisis, the inflation rate in all countries was the same.