Social security's long-term viability continues to remain uncertain because

answer:

the missouri comprommise line attempted to resolve the issue of slavery by drawing a line north-south through the louisiana purchase.the missouri comprommise line attempted to resolve the issue of slavery by drawing a line north-south through the louisiana purchase.the missouri comprommise line attempted to resolve the issue of slavery by drawing a line north-south through the louisiana purchase.the missouri comprommise line attempted to resolve the issue of slavery by drawing a line north-south through the louisiana purchase.

explanation:

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

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