A 20-year-old man has his spinal cord severed at T6 in an automobile accident. He devises a method to distend the rectum to initiate the rectosphincteric reflex. Rectal distention causes which of the following?

\begin{array}{llcc}\underline{\text { Relaxation of Internal }}&\underline{\text {Contraction of External}}&\underline{\text { Contraction}} \\\underline{\text { Anal Sphincter}}&\underline{\text {Anal Sphincter}}&\underline{\text { of Rectum}}\end{array}

\begin{array}{llcc}\quad\text { No } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { No }\end{array}

\begin{array}{llcc}\quad\text { No } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { Yes }\end{array}

\begin{array}{llcc}\quad\text { Yes } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { Yes }\end{array}

\begin{array}{llcc}\quad\text { Yes } &\quad\quad\quad\quad\quad\quad\quad\quad \text { No }&\quad\quad\quad\quad\quad\quad\quad\quad\text { No }\end{array}

\begin{array}{llcc}\quad\text { Yes } &\quad\quad\quad\quad\quad\quad\quad\quad \text { Yes}&\quad\quad\quad\quad\quad\quad\quad\quad\text { Yes }\end{array}

Which of the Following Elements of the Defecation Apparatus Requires

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