Read the sentence. mexican culture is a mixture of native american north american and spanish influences. what answer shows proper comma usage?
(a) mexican culture is a mixture, of native american north american and spanish influences.
(b) mexican culture is a mixture of native american, north american, and spanish influences.
(c) mexican culture is a mixsture of native american north american, and spanish influences.
(d) mexican culture is a mix of native american, north american and, spanish influnces.

The answer that shows proper comma usage is (B) Mexican culture is a mixture of native american, north american, and spanish influences.

Explanation: The rules of comma usage indicate that it is correct using commas to separate items or elements in a series. Moreover, they also establish that it is correct adding a comma before a coordinating conjunction. In that way, the answer that shows proper comma usage is B. ("Mexican culture is a mixture of native american, north american, and spanish influences") because it separates the different elements (native american, north american and spanish influences) by means of commas and it includes a comma before the coordinating conjunction "and".