Place the Following in Correct Sequence from Simplest to Most

Place the following in correct sequence from simplest to most complex:
1) molecules
2) atoms
3) tissues
4) cells
5) organs

A) 1- 2- 4- 3- 5
B) 1- 2- 3- 4- 5
C) 2- 1- 4- 3- 5
D) 2- 1- 3- 4- 5