The diagram presents a vertical cross-section of part of a human eye. A fly is moving closer towards the eye. The eye starts to focus the fly’s image onto its retina. How do the labelled parts of the diagram change?
- AQ contracts, R thinner, S tighter
- BQ relaxes, R fatter, S slacker
- CQ contracts, R fatter, S slacker
- DQ relaxes, R thinner, S tighter