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				| 1. | According to Coulomb's wedge theory, the active earth pressure slides the wedge | 
| A. | down and outwards on a slip surface | 
| B. | up and inwards on a slip surface | 
| C. | horizontal upward and parallel to base | 
| D. | horizontal inward and parallel to base. | 
| Answer» B. up and inwards on a slip surface | |