Which situation best illustrates the economic concept of opportunity cost? A. A business has to change its production methods to meet environmental regulations, B. A business decides to expand by borrowing a lot of money from an investor C. A business hires a new programmer, so it can't afford to hire a new salesperson D. A business opens branches overseas, so it has to hire more multilingual staff.​

A. A business has to change its production methods to meet environmental regulations

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation: