J&J body shop has a contract which references an addendum that J&J body shop doesn't provide to its customers. This addendum contains contract terms that are both important and unreasonable. This purposeful omission of the addendum is an example of:

Select one:

a.

substantive unconscionability.

b.

a reasonable, legal business practice.

c.

unconscionable usury.

d.

procedural unconscionability.