Choose the group of words that best completes the sentence.
Upon realizing that the deadline had been moved up by two weeks, .
- immediate adjustments to the project timeline were made by team leaders
- the team leaders immediately made adjustments to the project timeline (correct answer)
- adjustments to the project timeline were immediately made by team leaders
- the project timeline received immediate adjustments from the team leaders
Explanation: When you encounter a sentence that begins with a dependent clause starting with "Upon realizing," you need to pay careful attention to who is doing the realizing. The opening phrase "Upon realizing that the deadline had been moved up" requires the subject of the main clause to be the person or group doing the realizing. The correct answer is B because "the team leaders" are logically the ones who realized the deadline change, making them the appropriate subject to follow the introductory phrase. The sentence flows naturally: "Upon realizing that the deadline had been moved up by two weeks, the team leaders immediately made adjustments to the project timeline." Answer A creates a dangling modifier because "immediate adjustments" cannot logically realize anything about deadlines. The passive voice construction disconnects the action from those who discovered the deadline change. Answer C has the same fundamental problem—"adjustments" cannot be the ones doing the realizing, even though the passive voice attempts to credit the team leaders later. Answer D also creates a dangling modifier since "the project timeline" cannot realize that deadlines have changed. The key issue in answers A, C, and D is that they use passive voice constructions that separate the subject from the action of realizing, creating grammatically incorrect dangling modifiers. Remember this pattern: when a sentence opens with a participial phrase or dependent clause describing an action, the subject of the main clause must be whoever performs that action. Active voice constructions typically avoid these modifier problems better than passive voice.