In class phaeophyceae, the plant body is usually attached to the substratum by a A and has a stalk, the B and leaf like photosynthetic organ-the C .

A. A holdfast, B stipe, C frond

B. A stipe, B holdfast, C frond

C. A frond, B stipe, C holdfast

D. A stipe, B frond, C holdfast

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