Determine which alcohol in the given pair is more acidic. Explain your choice.
2-propanol and 2-propanethiol

2-propanol is more acidic because O is more electronegative than S.

2-propanethiol is more acidic because S is larger and more polarizable, so the conjugate base is more stable.

2-propanol is more acidic because O is smaller than S and a negative charge is more stable on a smaller atom.

2-propanethiol is more acidic because S is less electronegative and a negative charge is more stable on an atom of lower electronegativity.