Questions: How did England's war minister, William Pitt, successfully cultivate wartime cooperation and unity between American colonial forces and British regular forces? - Enlisted the help of colonials, who were known for their long-term commitment to serving the British Army - Took advantage of colonial patriotism by making them the main effort in most battles - Allowed only disciplined British regulars to hold leadership positions - Capitalized on colonial self-interest by offering subsidies

The answer is: Capitalized on colonial self-interest by offering subsidies.

Explanation for each option:

1. Enlisted the help of colonials, who were known for their long-term commitment to serving the British Army: This option is incorrect. While colonial forces did participate in the war, they were not particularly known for a long-term commitment to the British Army. Many colonials were more focused on local defense and had varying levels of commitment to British military efforts.

2. Took advantage of colonial patriotism by making them the main effort in most battles: This option is incorrect. Although colonial forces were involved in many battles, the British regulars often took the lead in major military operations. The strategy was not primarily based on colonial patriotism but rather on practical military needs.

3. Allowed only disciplined British regulars to hold leadership positions: This option is incorrect. While British regulars often held key leadership roles, Pitt recognized the importance of colonial leaders and sometimes allowed them to take command in certain situations. However, this was not the primary method of cultivating cooperation.

4. Capitalized on colonial self-interest by offering subsidies: This option is correct. William Pitt successfully encouraged cooperation by offering financial incentives and subsidies to the colonies. This approach appealed to the self-interest of the colonial governments, which were more willing to support the war effort when they received financial compensation and resources. This strategy helped to align colonial and British interests during the war.