If a column has low selectivity, this means: a. The column contains many distinct values. b. The column contains a small number of distinct values. c. A WHERE clause is always used in a query on the...

If a column has low selectivity, this means:

a. The column contains many distinct values.

b. The column contains a small number of distinct values.

c. A WHERE clause is always used in a query on the column.

d. The selectivity of a column can’t be determined.