Answer:
D and E
Explanation:
The other answers don't support steel, they support iron or are supporting both, and the question is why steel alloys are more often used
C supports both
B supports how iron's strength
A supports iron being easily shaped and bent
hope this helps
Answer:
Dos quintos al cuadrado dividido cinco medios a la menos 1.
Explanation:
The chemical reactions necessary are unable to occur without the addition of different ingredients