\[\Delta +[\,\,\,]=10\] \[[\,\,\,\,]-\Delta =2\](The two number sentences shown above are true.) Which of the following values for \[\Delta \] and \[[\,\,\,\,]\] make both number sentences true?

• A. \[[\,\,\,\,]=6,\,\Delta =4\] 
• B. \[[\,\,\,\,]=8,\Delta =2\]
• C. \[[\,\,\,\,]=7,\Delta =3\]
• D. \[[\,\,\,\,]=8,\,\Delta =6\]