Final answer:
To indicate understanding, parents should ensure that the full course of antibiotics is completed.
Step-by-step explanation:
The correct statement that indicates understanding of the instructions for administration of antibiotics after a myringotomy with insertion of tympanostomy tubes is: c) We will complete the full course of antibiotics. It is important to complete the full course of antibiotics prescribed by the doctor, even if the ear pain is gone or the child no longer has a fever. This ensures that all the bacteria causing the infection are eradicated and prevents the development of antibiotic resistance.