What Does It Mean If a Good Is Classified as Excludable

Multiple Choice

What does it mean if a good is classified as excludable?

A) That anyone who does not pay for the good cannot consume it
B) That someone can be barred from consuming the good based on race, creed or some other irrelevant characteristic
C) That consumption of the good causes no externalities
D) That a producer with patent or copyright protection can exclude any other producer from selling his product