A company enters into a long futures contract for 5.000 bushels of wheat at $6.50 per bushel. The initial margin is $4,000 and the maintenance margin is $3.000. What price change would lead to a margin call? ef Select one: O a. The price per bushel talls to 56.30 b. The price per bushel rises to $6.70 C. The price per bushel falls to $5.50 d. The price per bushel rises to $5.50 e. None of the above are true