Which of the following sentences is correct?

1. It has made us aware of many facts in life.
2. We has been very grateful to them since day one.
3. Reading have broadened our knowledge of many things.
4. My brother has shown great interest in reading since his younger years.


A. 1 only

B. 1 and 2

C. 3 and 4

D.1, 3 and 4​