How Do Anoxygenic Phototrophs Benefit from Possessing Accessory Pigments That

How do anoxygenic phototrophs benefit from possessing accessory pigments that allow light to be harvested at deeper areas of a fluid environment?

A) This allows even anaerobic microbes to conduct photosynthesis,as they can harvest light energy in the deeper areas where oxygen won't be present.
B) The cells can use wavelengths of light that havenotbeen absorbed (filtered out) by the photosynthetic organisms closer to the surface of the fluid.
C) They don't have to compete with other cells that utilize oxygen in the upper levels for the scarce nutrients in the fluid environment.
D) This allows even anaerobic microbes to conduct photosynthesis,as they can harvest light energy in the deeper areas where oxygen won't be present AND can use wavelengths of light not absorbed (filtered out) by the photosynthetic organisms closer to the surface of the fluid.
E) This allows even anaerobic microbes to conduct photosynthesis,as they can harvest light energy in the deeper areas where oxygen won't be present,use wavelengths of light not absorbed (filtered out) by the photosynthetic organisms closer to the surface of the fluid; AND don't have to compete with other cells that utilize oxygen in the upper levels for the scarce nutrients in the fluid environment.