$\text{ One of the diameter of the circle circumscribing the rectangle }\mathrm{ABCD}\text{ is }4\mathrm{y}=\mathrm{x}+7\text{ . }$$\text{ If }\underset{\_}{\mathrm{A}}(-3,4),\mathrm{B}(5,4)\text{ . Then the equation of the side }\overline{DC}\text{ is }$

• A

  $x=0$

• B

  $y=0$

• C

  $y=5$

• D

  $x=-2$