Which of the Following Statements Is True?
A)Iron Ions Are $\circ$

Which of the following statements is true?

A) Iron ions are crucial for maintaining cellular fluid balance.
B) Humans rely primarily on panting to dissipate excess body heat.
C) Human cells maintain proper hydration primarily by controlling ions in fluid compartments.
D) Most people can tolerate a fever of 108 to 110 ^$\circ$