Final answer:
The emergency dispense button at a CDU/CRU dispenses 10 units of currency when activated, assisting in emergency or manual cash dispensation.
Step-by-step explanation:
The emergency dispense button at the CDU/CRU (Cash Dispensing Unit/Cash Recycling Unit) is a feature used in financial or banking machinery like ATMs or cash recyclers. This button is used in cases where an emergency or manual operation is needed to dispense cash directly from the machine. Based on the provided information, the correct amount of units that are dispensed when the emergency dispense button is pressed is 10 units. Thus, the correct answer to the question 'What is the emergency dispense button at the CDU/CRU, and how much is dispensed?' is B) 10 units.