A. A chain of 5 carbons with upper C l at the end. B. Two central carbons bonded to C H 3 at each end, and also to the first of the 2 central carbons. C. A carbon is double-bonded to an o above and to 2 H C 3 below. D. 2 carbons are triple-bonded to each other, each with an H to the outside. Which of the following are hydrocarbons? Check all that apply. A. B. C. D.