Given two relation table R and S as follows:

R

A	B	C
a1	b1	c1
a3	b3	c3

S

A	B	C
a1	b1	c1
a2	b2	c2

What is the result from the following SQL statement?

SELECT * FROM R

UNION ALL

SELECT * FROM S

Group of answer choices

a

A	B	C
a1	b1	c1
a2	b2	c2
a3	b3	c3

Either a. or b.

b

A	B	C
a1	b1	c1
a1	b1	c1
a2	b2	c2
a3	b3	c3

Neither a. nor b.