An investor purchased 100 shares of GRA stock at $100 per share in a margin account. Two years later, the GRA was sold for $120 per share. If the investor's account was charged $700 in margin interest, it would be proper to state that this is an example of

A) positive margin.

B) a long-term capital gain of $1,300.

C) negative margin.

D) a speculative investment.