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: 
- She is drunk .
 - None of the above choices .
 - She is nervous .
 - She is drinking champagne .


She is nervous .