Researchers can study the developmental distribution of chloride transport in the killifish by

A) labeling Na⁺-K⁺-ATPase with an antibody that glows green.
B) exposing killifish to different concentrations of chloride during development and measuring chloride flux.
C) labeling the membrane of the chloride cells with a fluorescent dye.
D) using a microarray to measure the expression of chloride cells in different tissues.