Iron,an Important Component of the Steel Used in the Construction

Iron,an important component of the steel used in the construction of buildings,bridges,and railroads,combines with oxygen to form Fe₂O₃,which we recognize as rust.At room temperature,iron

A) combines readily with atmospheric oxygen to form Fe₂O₃.
B) requires the presence of a galvanizing agent and oxygen before it can rust.
C) gains valence electrons from atmospheric oxygen,forming Fe₂O₃.
D) requires the presence of hydrogen ions and oxygen before it can form Fe₂O₃.