A 4-year-old boy， who presented with cough， fever， and mild hypoxia， had evidence of a right upper lobe consolidation on his chest radiograph. A blood culture has become positive for Staphylococcus aureus. Approximately 24 hours into his hospitalization， the child has acutely worsened with markedly increased work in breathing and increasing oxygen requirement. The doctor order
A: Aspiration of a probable tension pneumothorax
B: A sedative to treat the childs attack of severe anxiety
C: Chest radiograph
D: A thoracentesis kit to drain his probable pleural effusions