The following chemical reactants produce the ester ethyl ethanoate (C $4 \mathrm{H}_{8} \mathrm{O}_{2}$ ):
$\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}+\mathrm{CH}_{3} \mathrm{COOH}$
What type of reaction occurs to make ethyl ethanoate?
a. condensation
b. hydrolysis
c. combustion
d. acid-base reaction