A Margin Requirement is the percentage of marginable securities that an investor must pay for with his/her own cash. It can be further broken down into Initial Margin Requirement and Maintenance Margin Requirement.
Answer:
John Muir- Father of our national park system
Alfred Wegener- Pangaea, the origin of continents
Aldo Leopold- Notice the natural world
Garrett Hardin- The Tragedy Of The Commons
Rachel Carson- Environmental Movement
Explanation:
Money is a substance that is acceptable as a medium of exchange for goods and services and can further be used to settle debt.
Money is well defined by its functions and characteristics.
The answer would be D. All of the above