An automated control system for a vaccine storage refrigerator is designed to monitor temperature as a decimal value, TTT, in ∘C^\circ\text{C}∘C.
The purpose of the algorithm is to output the warning "CRITICAL" if the temperature is strictly greater than 8.0∘C8.0^\circ\text{C}8.0∘C, and "NORMAL" if the temperature is 8.0∘C8.0^\circ\text{C}8.0∘C or below.
Below is an incomplete flowchart for this algorithm with four missing steps labelled A, B, C, and D.

Complete the flowchart by stating the correct input, decision, or output operation that belongs in each lettered box: