Future contracts and markets?

Which of the following is a correct statement about future contracts and markets?
A.) Trading on futures contracts are similar to forward contracts. There is no need for margin requirements.
B.) Whenever I sell or buy a futures contract in the futures market, I will always be hedging.
C.) Imperfect convergence can be detected at any time during the term of the futures contract.
D.) Basis risk is a residual risk that arises because the movement in an asset’s spot price is not perfectly correlated with the movement in the price of the asset delivered under a futures contract.
E.) The basis risk can only be positive and will fluctuate with an (essentially) unpredictable pattern.

B