Creed, credo, dogma, belief, conviction, canon, principle, notion, idea, theory, thesis.
A. He regrets that he has acted so stubbornly and has caused his grandsons to suffer.
To find the direct object, find the subject "grandchildren," and the action verb "playing," then ask "whom or what" grandchildren are playing tag.
The answer is: B. tag
It is a run-on sentence. It should say:
There is an ostrich farm near our house. The owner sells ostrich eggs.
(Weird sentence ;P)
