D. <u>T</u>he <u>B</u>attle of <u>O</u>kinawa, the last and largest battle of the <u>P</u>acific <u>W</u>ar, was one of the costliest battles of <u>W</u>orld <u>W</u>ar II for both <u>A</u>mericans and <u>J</u>apanese.
The preposition in this case is From while the prepositional phrase is From China as it consists of the preposition from and the noun China.
Answer: 1: tree planting competition 2: in the news 3: wanted help