In which part of the kidney does the majority of water reabsorption occur

The nephrons are the part of the kidneys that are responsible both for the absorption and re-absorption of water within the kidneys. These nephrons have a network or chain of command that filters large molecules such as proteins and cells, within the kidneys. The nephrons need to re-absorb water in order to further convert this into materials that can be excreted by the body, like urine.

The answer would be a