Ow are the united states and canada connected to other countries through trade

The United States had become Canada's largest market, and after the war the Canadian economy became dependent on smooth trade flows with the United States so much that in 1971 when the United States enacted the "Nixon Shock" economic policies (including a 10% tariff on all imports) it put the Canadian government into a panic. Washington refused to exempt Canada from its 1971 New Economic Policy, so Trudeau saw a solution in closer economic ties with Europe.

Explanation:

did mary wollstonecraft believe was a natural ingredient for women’s happiness?

so you should go with

a. strong