Suppose that you are considering subscribing to Economist Analyst Today magazine. The magazine is advertising a one-year subscription for $90 or a two-year subscription for $176. You plan to keep getting the magazine for at least two years. The advertisement says that a two-year subscription saves you $4 compared to buying two successive one-year subscriptions. If the interest rate is 12%, should you subscribe for one year or for two years? (Assume that one year from now a one-year subscription will still be $90.)
A. You should subscribe for one year.
B. You should subscribe for two years.