Currency risk is based on what assumption? OA. The value of one dollar today is greater than the value of one dollar to be received one year from now. OB. Values of foreign currencies continually rise and fall in most countries. OC. The U.S. stock market fluctuates daily. OD. Firms that do not continuously innovate will lose market share. OE. Changing product lines by reacting to every current trend may alienate the customer base.