dual purpose of impeding possible strikes into their colonies and encouraging Canadians to support the rebellion. Explanation:
American forces carried political tracts as they marched into Canada in the fall of 1775 with the dual purpose of impeding possible strikes into their colonies and encouraging Canadians to support the rebellion.
<span>Assuming that this is referring to the same list of options that was posted before with this question, the best option is "exercise" since it can clear the mind. </span>