Which of the Following Correct Regarding Redox Couples Is NOT

Which of the following correct regarding redox couples is NOT?

A) Standard reduction potentials are measured relative to a standard hydrogen cell (H⁺/H₂) .
B) For cells in which electrons flow toward the sample half-cell,the reduction potential is positive.
C) A redox couple consists of a substance being oxidized and the substance oxidizing it.
D) A half-reaction involving the loss of electrons is an oxidation reaction.