<span>The best opening sentence for such a business/informal letter is B. Your order of February 10 arrived in our office today. This is the only sentence that doesn't sound too formal and use a bunch of fancy words in order to make it seem more formal, which is the reason why it is the least formal, in this case and thus the correct answer.</span>
Quad is a root word for four so quadruplex would mean four screens.
Becca's science fair project as beginning
house and wow as middle sentence
start over as end of sentence
B. If anybody claims the ring you found, you’ll have to give it to him or her.
Singular Indefinite Pronoun: “anybody”
