Question

during the process of anaerobic digestion, animal waste produces methane gas. recently, biochemists sponsored by the department of energy discovered a way to make synthetic versions of waste that give off even more methane. you might be asking why the department of energy is sponsoring such developments. the reason is that methane produced by such waste could someday generate enough electricity for a whole city. what assumption does the author of the passage make? a gases made from waste will be cheaper to make than other gases. b the department of energy has already been using methane - generating waste for electricity. c synthetic algae will not be able to undergo anaerobic digestion. d readers would not typically link the department of energy with animal waste research.

Explanation:

The author anticipates readers questioning the Energy Department's sponsorship of waste - methane research, implying a non - typical link in readers' minds between the department and animal waste research. There's no mention of cost comparison (A), current use of waste for electricity (B), or synthetic algae's anaerobic digestion ability (C).

Answer:

D. Readers would not typically link the Department of Energy with animal waste research.