Answer:
The answer <em>should be D.) Desired.</em>
Step-by-step explanation:
The definition of soothing is "<em>having a gently calming effect</em>",
A.) Hush, which in most cases is negative,
B.) Flaming, does not sound gentle OR calming,
B.) Fired usually comes from a negative impact, so your answer MUST and SHOULD be, D.) Desired.