Which of the Following Statements Is LEAST-Likely True

Which of the following statements is LEAST-Likely true?

A) A slow charge is easiest on the battery.
B) During a slow charge, the charging rate is between 10 amps and 25 amps.
C) A battery is fully charged at the end of a slow charge when its specific gravity does not climb higher during two checks with a hydrometer, done 1 hour apart.
D) Following a recharge, if the difference between hydrometer readings taken from different cells is more than 0.050, the battery should be replaced.