MCQOPTIONS
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| 1. |
%_A rift valley is formed mainly due to _________% |
| A. | Forces of tension in the earth's crust |
| B. | The subsidence of the floor of a river valley |
| C. | The valley formed after the formation of fold mountains |
| D. | The deepening of a valley by ice action |
| Answer» C. The valley formed after the formation of fold mountains | |