Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants and prove that such mutations do not originates as adaptation. These imprints need to be used -

1. A. On plates with and without streptomycin
2. B. Only on plates with streptomycin
3. C. On plates with minimal medium
4. D. Only on plates without streptomycin

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