Which of the following is a complex sentence? a. eileen bought pants but not a new jacket. b. sue gave jim a new racket, and he left for the tennis courts. c. mark wanted blueberry pie and vanilla ice cream. d. as i expected, she showed up late.

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.

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.