Money that is collecting interest in a bank account doubles in value every 8 years. When the account was opened, it contained 8 dollars, or 2³ dollars. In 32 years, the account balance has doubled 4 times, increasing by a factor of 24. It now has a balance of 23-24. Expressed as a power, how much money, in dollars, is in the account now? A. 2^4 B. 4^7 C. 2^7 D. 2^12