To assess for the presence of egophony, which instruction should the nurse give the client who has a lung abscess?

A. Repeat vocalizing the letter "E" while the thorax is auscultated: Egophony is assessed by having the client say "E" while the nurse auscultates the chest. In the presence of lung consolidation, such as in a lung abscess, the "E" sound may be auscultated as an "A"—a finding known as the "E-to-A" change, which is a hallmark of egophony.B. Whisper "one, two, three" in sequence during auscultation of the thorax: This technique is used to assess whispered pectoriloquy, not egophony. It helps detect areas of lung consolidation if whispered words are heard clearly through the stethoscope.C. Repeat the number "99" during a systematic auscultation of the thorax: This test is used to assess bronchophony, increased loudness and clarity of spoken words, another sign of lung consolidation. Clear transmission of "99" may suggest fluid or consolidation in the lungs.D. Breathe in and out while all lobes of both lungs are auscultated: This is a standard part of respiratory assessment but is not specific for egophony. It helps detect abnormal breath sounds like wheezes, crackles, or diminished sounds, not vocal resonance changes.