B:American contributions to the columbian exchange
Answer:
American and Canadian railroads begin using four continental time zones to end the confusion of dealing with thousands of local times.
Explanation:
To allow American merchant ships to access war zones
On two levels, then, Washington Irving profoundly influenced the American Christmas. His melding of jolly St. Nick and an English commemoration of old into a wintry celebration of nostalgia attests to the rich cultural legacy bequeathed to us by this native New Yorker..
