Which Statement About John Joly's Salty Ocean Theory to Calculate

Which statement about John Joly's salty ocean theory to calculate Earth's age is false?

A) John Joly's theory gives a more accurate estimate of Earth's age now that more accurate observational data is available.
B) Joly believed that the ocean began as a salty body of water and that salt entered it from rock sources at a steady rate.
C) Joly's method was less accurate than Kelvin's.
D) Joly underestimated the amount of precipitated rock salt in the world.