Database Management Systems·SQL Basics·CoreTwo counts that disagreeOn the same table, COUNT(*) returns 1000 and COUNT(phone) returns 870.What does that tell you?A130 rows have duplicate phone numbers that were collapsedB130 rows have NULL in phone; COUNT of a column ignores NULLsCCOUNT(*) includes rows deleted but not yet vacuumedD130 of the rows hold an empty string, which COUNT treats as absentCheck answer