Teresa works for a toy manufacturer and is responding to the claim of a disgruntled customer. The customer is upset because the interactive toy he purchased for his child stopped working the day of the purchase. The customer tried replacing the batteries, but that would not fix the problem. Teresa knows that there have been issues with this product, and she decides to write (an) adjustment message.

Which of the following sentences would be appropriate for Teresa to include in her adjustment message? Check all that apply.
-You can use the enclosed voucher to purchase a new product of your choice.
-I promise this will never happen again.
-I wasn't personally responsible for the defect, but I'll see what I can do.
-Perhaps your child did something to the toy to cause it to stop working.