The main idea of this paragraph is A
I think B is the most accurate answer because knowing the daily weather forecast can help you pick a reasonable outfit for a cold or hot day
The discovery of a fault line along the ocean floor
Explanation:
The St. Lawrence seaway helped because it was large enough to allow shipping transportation to the USA. Which allowed Canada and the USA to trade goods. The seaway extends from Montreal through the Welland Canal in Ontario, Canada, to the eastern portion of Lake Erie.
(Have a great day!)
