To import the data from a database into a DataFrame, you
a) use Pandas methods to create a SQL statement that selects the data that you want and then use that statement in a read_sql_query() method
b) import the entire database and then use the Pandas sql_select() method to keep just the rows and columns that you want to work with
c) import the entire database and then use Pandas methods to delete the rows and columns that you don't need
d) use SQL to create a SQL statement that selects the data that you want from the database and then use that statement in the read_sql_query() method