Final answer:
The sentence 'From his seat in the grandstand, Jim watched the runners approach the finish line' does not have any misplaced modifiers. Misplaced modifiers are improperly separated from the words they modify.
Step-by-step explanation:
The sentence without misplaced modifiers is: 'From his seat in the grandstand, Jim watched the runners approach the finish line.'
Misplaced modifiers are words, phrases, or clauses that are improperly separated from the words they modify. In the correct sentence, the phrase 'from his seat in the grandstand' correctly modifies 'Jim watched', describing where he was doing the watching from. In the other sentences, the placement of the modifier introduces ambiguity.
Learn more about Misplaced Modifiers