Answer: Because we believed everything our parents told us-
Explanation: We were gullible children. lol-
<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>
Answer is B
A just gives off what happens
C was gives off it was in the past
D gives off what they need to expect in the future
He wanted to make inventions for other people. I know that might not be the awnser but that's what I think