Which sentence has a gerund or gerund phrase that functions as the direct object of the sentence? a. the burning of fossil fuels releases methane into the air. b. at the urging of many, government leaders look for ways to reduce pollution. c. scientists studied the trapping of gases in the atmosphere.

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

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