I know that D is one of the answers but i can’t figure out anymore
This could be one of two things, I need a bit more information, but perhaps you can decide.
Drip irrigation otherwise called trickle irrigation delivers water using tubes and emitters to the base of the plant. Subsurface irrigation uses a combination of tubes and emitters and is buried under ground. Good luck
The answer is II China, China is the world leader in trade and manufacturing country in the world(it's the dominant) It's been predicted to be the largest industrial economies by 2050.