With reference to the snapshot of MS-EXCEL worksheet given below, which of the following formule A-E when entered into cell A4 can be used to add the values 10, 20 and 30?

	A	B	C
1	10
2	20
3	30
4

A. =SUM (A1:A3)

B. =SUM (A1, A3)

C. =A1 + A2 + A3

D. =SUM (A1, A2, A3)

E. =SUM (A1 - A3)

Choose the correct answer from the options given below: