Read the following context and choose the best option to answer the question.
Context: She feels light - headed , like she 's drinking champagne at too high an altitude . She strokes his hair , his shoulders , his face . She passes her thumb over his bottom lip , wipes herself away . He stares at her , and does not smile .
Question: Why does the character feel lightheaded ?
Options: 
A. She is drunk .
B. None of the above choices .
C. She is nervous .
D. She is drinking champagne .


C