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Regarding the matters needing attention in anal examination (rectal finger examination), the error is
A.
Rectal tenderness, often caused by anal fissure and infection;
B.
Tenderness accompanied by fluctuation, seen in abscess around anus and rectum;
C.
Soft, smooth and elastic masses in rectum are usually rectal polyps;
D.
Rectal cancer should be considered when touching a hard uneven mass;
E.
There is mucus, pus or blood on the surface of the finger cuff. it is not necessary to perform smear microscopic examination or bacteriological examination.