Which of the statements is correct.

Select one:

a$.$ All answers are examples of the $3V\text{'}$s$.$

b$.$ The URL can be used to include pictures of the property which is an example of variety of data.

c$.$ The number of properties in the database is an example of volume.

d$.$ Interest rates, employment rates, taxes, school rankings are examples of variety of data.

e$.$ Days on market is an example for velocity data because it changes from day to day.