11. Which leaf trait is most directly associated with efficient photosynthesis in high-light environments?
(A) A thick cuticle and reduced stomatal density, which primarily limit water loss.
(B) Kranz anatomy, in which bundle sheath cells rich in chloroplasts surround the vascular tissue and are encircled by mesophyll cells, enabling spatial separation of initial CO2 fixation and the Calvin cycle.
(C) Large intercellular air spaces in the spongy mesophyll that facilitate internal gas diffusion.
(D) A thin epidermis lacking chloroplasts, allowing light to penetrate underlying tissues.
(E) Increased trichome density on the leaf surface, reflecting excess radiation.

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