The passage is most likely to be a part of a (n) ______.

A．countering a flawed argument that dismisses a possible solution to a problem
B．reconciling contradictory points of view about the nature of a problem
C．identifying the strengths of possible solutions to a problem
D．discussing a problem and arguing in favor of one solution to it

A．the combustion of gasoline releases photo chemically active hydrocarbons
B．the combustion of gasoline involves an intricate series of reactions
C．gasoline molecules have fewer carbon-carbon bonds
D．gasoline is a carbon-based fuel with smaller molecules