Use the laws of superposition and cross cutting to order the layers A, B, C and D. 1. Oldest layer
2. Second oldest layer
3. Third oldest layer
4. Fourth oldest layer
M=Fault

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explanation:

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

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just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project