Which of the following would not be a good clincher sentence for an essay that begins with the thesis below?

Thesis: The easiest and quickest way to reduce America's
energy consumption is to build cheap and effective mass-
transit systems in our 30 biggest cities.

A. We can get more bang for our buck and more actual reduction in
energy consumption through a program of rapidly building mass
transit in key cities than we can through any other single method.
B. The easiest and quickest way to reduce America's energy
consumption is to build cheap and effective mass-transit systems
in our 30 biggest cities.
C. Mass transit is the only effective solution to our nation's energy
woes.
D. That's 30 cities, 30 subway systems, and one energy crisis solved