Final answer:
Lee's reaction to the proposal of blowing up the bridge cannot be ascertained from the provided information, which focuses on Lincoln's dilemma and his cabinet's cautious approach to the situation at Fort Sumter.
Step-by-step explanation:
Lee's reaction to the proposal of blowing up the bridge is not explicitly detailed in the provided historical context of Lincoln's dilemma regarding Fort Sumter. Instead, the information given focuses on President Lincoln's cabinet's reactions to the Fort Sumter situation at the onset of the American Civil War, revealing a general reluctance to initiate conflict. The given passages suggest a tendency for caution and avoidance of outright aggression. Therefore, while we can infer that there might be parallels in decision-making approaches, without more context specific to Lee's circumstances, deducing Lee's reaction to the bridge proposal would be speculative.
Had Lee been faced with a similarly crucial decision, it's plausible that like Lincoln's cabinet, he would have contemplated the potential ramifications thoroughly before acting. However, any assertion about Lee's reaction, whether he would be enthusiastic and supportive, hesitant but willing to consider, completely opposed, or indifferent, can only be conjecture without direct historical evidence or a clear link to the bridge scenario.