Final Answer:
If Shakespeare's The Tragedy of Romeo and Juliet were set in modern times, the absence of cell phones would heighten the sense of urgency, making option B the most likely impact on the plot.
Step-by-step explanation:
In the context of a modern setting, the lack of cell phones would create a narrative environment where characters face increased challenges in immediate communication. This absence amplifies urgency, intensifying the tragic unfolding of events. While social media (option C) and written letters (option D) might still play roles, the immediacy associated with cell phones aligns with the urgency central to the original plot. Therefore, option B is the most plausible consequence in a modern adaptation, capturing the essence of miscommunication and urgency intrinsic to the classic tragedy.
Option B is the answer.