Answer: A. Ascending and transverse colons
Explanation:
The ascending and transverse colons will be impaired due to injury because Blood from the superior mesenteric artery and parasympathic nerve fibres from the vagus nerve is collected by the ascending and transverse colon.
However, blood from the lower mesenteric artery and parasympathic nerve fibres from the pelvic splanchnic nerve originating from sacral spinal nerves (S2-S4) is provided by the descending and sigmoid colons.
Hence, the correct answer is A. "Ascending and transverse colons".
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