Once the United States entered World War I, its navy played a key role by O shipping soldiers across the ocean to Europe.
protecting American ports from German attack.
escorting merchant ships across the Atlantic Ocean.
supplying technology to the British Navy.

To fight better

Explanation:On May 24, 1917, driven by the spectacular success of the German U-boat submarines and their attacks on Allied and neutral ships at sea, the British Royal Navy introduces a newly created convoy system, whereby all merchant ships crossing the Atlantic Ocean would travel in groups under the protection of the British navy.

Once the United States entered World War I, its navy played a key role by

shipping soldiers across the ocean to Europe.

protecting American ports from German attack.

escorting merchant ships across the Atlantic Ocean.

supplying technology to the British Navy.

answer is C.

Explanation:

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.