Final answer:
The correct preparation for intravesical chemotherapy is for the patient to hold the solution in the bladder for 2 hours before voiding to ensure optimal therapeutic effect.
Step-by-step explanation:
When preparing a patient for the administration of the first ordered instillation of topical chemotherapy after incomplete resection of a bladder tumor, the nurse should emphasize the need for the patient to hold the solution in the bladder for 2 hours before voiding. This allows adequate contact time between the chemotherapeutic agent and the bladder lining to exert its therapeutic effect. Hence, the correct answer is B) Hold the solution in the bladder for 2 hours before voiding. The other options are not typically associated with intravesical chemotherapy treatments. It is not necessary to remain NPO for 12 hours prior to treatment (option A), nor to drink the intravesical solution quickly and on an empty stomach (option C). While dietary adjustments might be necessary for other types of treatments, avoiding acidic foods and beverages is not a typical requirement for intravesical chemotherapy treatments (option D).