Question

What is unique about the development of money?
a. It can be traced back to a source
b. It has an inventor
C. It appeared in unconnected places in a similar way
d. It was developed in ancient civilisation​

Answer 1

2+2=?

2 + 2 = 4

2+2=4

2 + 2 = 2

2+2=2×2

1 + 1 + 1 + 1 = 4

1+1+1+1=4