Science Help!!!!

Which of the following is a source of photochemical smog.
A. Fossil fuels
B. Wind energy
C. Biomass fuels
D. Nuclear energy
Is the answer A?

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  1. Yes. You're right again.

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    Ms. Sue
  2. Yes, but fossil fuel emissions are not the only ingredient.

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  3. okkkkkkk so A?

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  4. What are all the answers to the Unit Test?

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  5. Now I'm not trying to be mean but unit test should be done on your own.
    (Sorry this message is a very very late reply).

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  6. on god!!!!!!!!!!!!!! thank you R.I.P.

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