Confused by the complex instructions, _________
Which choice completes the text so that it conforms to the conventions of Standard English?
the assembly of the bookshelf took much longer than anticipated.
the bookshelf took much longer to assemble than anticipated.
Mark took much longer to assemble the bookshelf than anticipated.
it took Mark much longer to assemble the bookshelf than anticipated.
Correct Answer: C
Choice C is the best answer. The introductory phrase "Confused by the complex instructions" describes a person's mental state. "Mark" is the correct subject.
Choice A is incorrect because "the assembly" cannot be confused. Choice B is incorrect because "the bookshelf" cannot be confused. Choice D is incorrect because "it" cannot be confused.