29. Dad: Do you know why we need to turn off lights, theTV, and the computer after use?
Shelly : _______
(A) This way, we can save both our money and theplanet.
(B) Yeah! The underwater world on Green Island isnot clear.
(C) Because we can turn them on when we want touse them.
(D) We use too many plastic bags and we need tosave our earth.