阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
A
The German shepherd runs off and noses around in the grass of Kenya’s Laikipia Plateau． “OK, Oakley,” the dog’s handler orders, “Find it!”
Oakley sniffs （嗅） until he comes to a bush, then stops, sits, and looks up at his handler． She bends to see what he has found: the waste of an endangered African wild dog． “Good dog!” she praises． The handler pulls a tennis ball from her pocket． Oakley jumps for his reward．
“He doesn’t actually want the waste,” says Aimee Hurt, a founding member of the U．S．-based group Working Dogs for Conservation． Hurt is in Kenya to train both Oakley and his handler． “He finds it so he can play with his ball． We’re the ones who want the waste．”
