Washington's night time mach across the Delaware River was called

George Washington's crossing of the Delaware River, which occurred on the night of December ... Washington's army then crossed the river a third time at the end of the year, ... The unincorporated communities of Washington Crossing, Pennsylvania, and Washington Crossing, New Jersey, are named in honor of this event.

Explanation:

it would be d). more resources must be obtained to attain that combination of goods and services