Which of the following is not a characteristic of a healthy relation?

a$.$ Each column has a distinct name $($technically called the attribute name$).$

b$.$ Each intersection of a row and column in a table may contain more than one value.

c$.$ All values in a column are values of the same attribute $($that is$,$ all entries must match the column name$).$

d$.$ The order of the rows and columns is not important.