What are some of the benefits of extending an existing table such as the Task...

What are some of the benefits of extending an existing table such as the Task table when creating a new application?

a. You can repurpose existing fields by simply changing the label.

b. Use existing fields with no modifications.

c. Existing logic from the parent table will be automatically applied to the new table.

d. All of the parent table records are copied to the new table.