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The Great Rift Valley is a

The Great Rift Valley is a series of contiguous geographic trenches.

Explanation:

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answer; ///( no)   they would be tried separate,criminal cases would be tried first, then the civil case;

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.