What Does the Value Of $\mathrm { K } _ { \mathrm { W } }$

Multiple Choice

What does the value of $\mathrm { K } _ { \mathrm { W } }$ say about the extent to which water molecule react with themselves?

A) Because the value of $\mathrm { K } _ { \mathrm { W } }$ is so small,the extent to which water ionizes is quite large.
B) Because the value of $\mathrm { K } _ { \mathrm { W } }$ is so small,the extent to which water ionizes is quite small.
C) Water molecules react with themselves at a constant rate,never increasing or decreasing.
D) When an acid is added to water,the value of $\mathrm { K } _ { \mathrm { W } }$