The answer is 900 and it is multiplication property
A. Yes, you must turn off the radio. / No, you need not turn off the radio.
B. Yes, he will come to the prize giving. / No, he won’t come to the prize giving.
C. Yes, they want a lift from us. / No, they don’t want a lift from us.
D. Yes, I can write a report for you. / No, I can’t write a report for you.
E. Yes, you should visit him in the hospital. / No, you shouldn’t visit him in the hospital.
The theme is the message an author is trying to send, or the main idea. The author's purpose is the reason an author writes something, whether it be to inform, entertain, etc.
