C. Running.
<span>participle is a verb like form such as running, going, gone, </span>chasing etc.
It's probably: Sure enough, Shiro was waiting for his master and the evening tid-bit. Then the old man said “Chin, chin!” and Shiro sat up and begged, and his master gave him the food, or maybe: <span>The happiest hour of the day both for the old man and his dog was when the man returned from his work in the field, </span>
It should be A because well look......
