Teacher:In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Teacher: Now, understand the problem? Solve this instance: [header] How to set up an inexpensive irrigation system [title] Purchase a faucet hose timer. [title] Put in fresh batteries at the beginning of each growing season. [title] Attach the timer to an outdoor spigot. <sep> (A) [step] Make sure that you place the water lines near/outside the danger zone. [substeps] Otherwise, appliances, other faucets, large growths, other hoses and fixtures may get submerged in water. (B) [step] Replacing the standard gas-fill hose starter would cost around 400 kg per gallon at $20. Attach one oxygen pump to the spigot and only turn the screws when all batteries are washed out. (C) [title] Allow water to accumulate in the spigot for 10 to 15 years, or another time period. [title] Look for a pump with metal stoppers. (D) [title] Attach your feeder hose to the timer. [title] At the end of your feeder hose, attach a hose manifold or multiple line splitters to accommodate the number of soaker hoses or sprinkler heads you need.
Student:
D