Answer :
D) Do you want the leftover spaghetti for dinner?
Although the other sentences contain articles (the, a, and an are the three articles that exist) they point out to a general noun (for ex: an airplane refers to any airplane). In the case above, "the" specifically refers to the leftover spaghetti (and not any spaghetti).
Although the other sentences contain articles (the, a, and an are the three articles that exist) they point out to a general noun (for ex: an airplane refers to any airplane). In the case above, "the" specifically refers to the leftover spaghetti (and not any spaghetti).