I would pick C but wait for more answers
Polk’s margin of victory was approximately 1.4 percent. :)
Answer:
I think that this was established for the expansion of transport and communication during the 19 century. Before the clocks were invented, the people just kept using the time from different instruments which help them observe the sun while it pass at noon.
I think the French surrender of Montreal was most significant for Britain as for future America it was, the Battle of Monongahela River when Washington had his first experience with true battle and lost his mentor Braddock.