The act of Redhibition is not available if:

The act of Redhibition, a legal remedy available under Louisiana law for buyers of defective goods, allows a buyer to rescind a sale or seek a reduction in the purchase price if the item has defects that render it unfit for its intended use. However, this remedy is not available under certain circumstances, all of which are covered in the correct answer.

If the buyer knew of the defects prior to the sale, they could not later claim Redhibition because the buyer has essentially accepted the product with its known flaws, waiving their right to assert claims regarding those defects. Similarly, if the defects were disclosed to the buyer before the sale, the buyer cannot claim Redhibition because they were made aware of the issues and chose to proceed with the transaction nonetheless. Lastly, if the defects in the item were apparent or could have been discovered through a reasonable inspection before the sale, the buyer is encouraged to perform due diligence. Since they had the opportunity to become aware of these issues, claiming Redhibition would not be justified.

Thus, the act of Redhibition is unavailable in these situations where the buyer's awareness, acceptance, or ability to discover defects is involved, making the collective option of "All of the above" the correct choice. This understanding emphasizes the