Which of the Following Is Correct Concerning the Sarcoplasmic Reticulum $\mu$

Multiple Choice

Which of the following is correct concerning the sarcoplasmic reticulum Ca²⁺ ATPase?

A) It is an example of an ABC transporter that interconverts between closed and open forms.
B) It transports Ca²⁺ from the sarcoplasmic reticulum into the cytoplasm.
C) This P-type ATPase maintains a calcium ion concentration of approximately 0.1 $\mu$ M in the cytosol and 1.5 mM in the sarcoplasmic reticulum.
D) One Ca²⁺ is transported for each ATP hydrolyzed.
E) None of the answers is correct.