John invested $750,000 in three small business 10 years ago, in three different cities of Iraq (Kirkuk, Bagdad and Sulaimani). He is considering the following two options:

Option A: Selling all his business with current market price for $1,600,000, what rate of return he has received during the past 10 years. (no dividend)

Option B: Keep all his business until he will have $5 million, how long does it take for his business to grow to $5million if the business has rate of return of 15%.