In his the american crisis pamphlet, thomas paine's purpose is to:

To Motivate the Distraught Patriots to Fight for American Victory

Explanation:

Thomas Paine wrote The American Crisis which was published from 1776 to 1783. This was the time of American Revolution. The year 1776 in American history was crucial since the entire cause of the American rebels was on the verge of collapse. The revolution was going through uncertain times. At such tough time Paine aimed, through his pamphlet, at breathing strong motivation into the distraught patriots so that they could fight to ensure victory for American.

i would have to say "a" or "d".