Which of the following types of research is conducted on multiple occasions over time? a. experimental b. longitudinal c. representative d. cross-sectional

Correct answer choice is :

A longitudinal study is an analysis plan that includes repeated observations of the same variables over the short or long duration of time. It is often a type of observational study, although they can also be structured as longitudinal randomized practices.

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.

i believe the correct answer is c