At what concentration do C4 plants show saturation?

1.	At what concentration do C₄ plants show saturation?
A.	430 lL<sup>-1</sup>
B.	450 lL<sup>-1</sup>
C.	340 lL<sup>-1</sup>
D.	360 lL<sup>-1</sup>
Answer» E.

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