A Friend Showed You the Following Table: ​ ​

A friend showed you the following table: ​ ​
What guideline in table construction does this table violate? ​

A) Tables should have a succinct heading.
B) The attributes of each variable should be clearly indicated.
C) The base for percentages should be included in the table.
D) The number of missing cases should be indicated in the table.
E) The table doesn't violate any guidelines.