I don't understand these questions and would like someone to clarify

The currency used to buy imported goods is O special drawing rights. O dollars if the good purchased is a commodity. O the currency of a third country (excluding the USD for commodities) O the seller's home currency the buyer's home currency.Net exports equals O exports of goods and services minus imports of goods and services imports of goods and services minus exports of goods and services. O private savings plus government spending less consumption O Output less consumption, private investment, and government spendingHedging in the fx market can be accomplished by: [:1 A currency futures contract C] a currency forward between individuals C] a currency call option C] a currency put option C] a currency swap at two different points in time