Read the following paragraph about train travel: traveling cross-country by train is a great way to experience america. gas prices are astronomical, but train fares tend to stay the same. plus, you won’t have to worry about being cramped in the back seat when you have an entire train car to stroll down. so just sit back and enjoy the american countryside as it whisks past your window at 150 miles per hour. how would you characterize the author’s development of the key concept? a. the author argues that gas is expensive and that trains are better for the environment. b. the author compares train speeds with those of other forms of travel. c. the author provides examples of why trains are a comfortable and economical way to travel. d. the author explains how much he dislikes being cramped in the back seat of cars.