Which of the bones listed below form the thoracic cage?
1. clavicle
2. ribs
3. scapula
4. sternum
5. bodies of thoracic vertebrae
A 1, 2
B 1, 2, 3, 4, 5
C 2, 3, 4, 5
D 2, 4
E 2, 4, 5