The Combustion of Butane (C₄H₁₀) Forms Carbon Dioxide and Water $\frac { 13 } { 2 }$

The combustion of butane (C₄H₁₀) forms carbon dioxide and water. What is the stoichiometric coefficient for oxygen in the balanced equation when 1 mol of butane undergoes combustion?

A) 9
B) 13
C) $\frac { 13 } { 2 }$
D) $\frac { 9 } { 2 }$
E) 5