Finance swap practice question

Which of the following statements is true about foreign exchange futures contracts? A trader of foreign exchange futures contracts will receive margin call when the balance of the margin account reaches the initial margin Foreign exchange futures contracts are customized contracts traded over the counter between big companies and commercial banks Because foreign exchange futures contracts have significant counter-party default risk, dealers of such contracts will charge a bid-ask spread for making the futures market Qpen position in a foreign exchange futures contract can be closed before the expiration date of the contract None of the given statements is true