Answer:
Correct answer is They lacked decent food, clothing, shelter and medicine. Washington's greatest challenge at Valley Forge was keeping the Continental Army together.
Step-by-step explanation:
The winter of 1777-78 was probably the hardest for the Washington's army.
His troops were in terrible condition. Located only 20 miles away from Philadelphia, Valley Forge was the crossroad for the war efforts. After they survived this winter, the Washington's troops survived the greatest problem of the war.