To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than
A. $$\frac{{\text{b}}}{3}$$
B. $$\frac{{\text{b}}}{4}$$
C. $$\frac{{\text{b}}}{5}$$
D. $$\frac{{\text{b}}}{6}$$
Answer: Option D

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