If an object moves closer to an octopus, must the octopus move its lens closer to or farther from its retina to keep the object in focus?

O focus its eyes, an octopus doesnot change the shape of its lens, as is the case in humans.Instead, an octopus moves its rigid lens back and forth, as in acamera. This changes the distance from the lens to the retina andbrings an object into focus.

If an object moves closer to an octopus, must the octopus move itslens closer to or farther from its retina to keep the object infocus?

hope dis helps

Ithink the answer is d.