farmerjoe
farmerjoe farmerjoe
  • 14-03-2019
  • Biology
contestada

I need to know if the answer is a, b, c, or d

I need to know if the answer is a b c or d class=

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ali9271 ali9271
  • 14-03-2019
the answer is D because the layers all the way at the bottom had to be there for other layers to be built on top
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