Quick answer this!
when a person drinks too much water too quickly, the fluid surrounding a person’s cells changes from:
a. hypertonic to hypotonic
b. isotonic to hypertonic
c. isotonic to hypotonic

The correct answer is c isotonic to hypotonic

Explanation:

The cells which are present inside our body remain isotonic with respect to the extracellular medium.As a result the cells neither swells nor shrinks.

     If a person drinks too much water the water content of the extracellular medium is increased.As a result the extracellular fluid becomes hypotonic with respect to the cell.

      From this point of view it can be stated that drinking excess amount of water converts extracellular fluid from isotonic to hypotonic solution.