Answer:
The answer is true, iron is a neccesity and can eb found in many foods that we eat. It is also one of the most important building materials for structures and large construction projects.
C. I think it’s c it’s either c or a but c sounds better
D. MLA format is best when it comes to English papers.
Your answer is C, its the only sentence that goes with the passage. :)
Hope this helps! :)