B You are looking to find a buffer solution. A buffer is made by mixing a weak acid/base with its conjugate base/acid. HCl and NaOH are not weak acids or bases. So that only leaves B Solution B You are looking to find a buffer solution. A buffer is made by mixing a weak acid/base with its conjugate base/acid. HCl and NaOH are not weak acids or bases. So that only leaves B.