There wasn’t enough money to run the government and pay war debts.
The benevolent period of Salutary Neglect all changed after the French and Indian War (aka Seven Years War 1755-1763) Although the French and Indian War was a victory for the British they were left with a massive war debt. To pay the war debt the British ended their policy of Salutary Neglect in the colonies.
<span>B. Encouraging massive migration of Mexicans across the border </span>
Scared people to not read it