Which is true about P-iris?

[answerhappygod]

Which is true about P-iris?

A. The P-iris makes use of a novel p-shaped blade that reduces complexity and cost while maintaining image quality
B. In bright situations. P-iris limits the closing of the iris to avoid blurring caused by diffraction when the iris opening becomes too small
C. The P-iris delivers the optimal depth of field by always using the smallest possible aperture for the available lightning
D. The P-iris makes use of a novel p-shaped blade that allows the iris to react to rapidly changing lighting conditions