Question $48$ of $58$

As of $2019,$ the mole is now officially defined as:

A $1\mathrm{.}66053906660{10}^{-24}$ elementary entities

B $6\mathrm{.}02214076{10}^{23}$ elementary entities

C The elementary entities found in $0\mathrm{.}0012kg$ of ${?}^{12}C$

D The elementary entities found in $0\mathrm{.}0012kg$ of ${?}^{14}C$