No however you can be thankful
C. I found a bag of marbles.
This is the only sentence that contains an indefinite article. Indefinite articles are "a" and "an" for singular nouns. "some" is the indefinite article used for plural or uncountable nouns.
"the" is a definite article.
Answer:
They have a different way of seeing something.
Answer:
The taecher told that he had written the equation on the board.