Use table of bond enthalpies to determine which species is more stable, cyclopentene or pentadiene.

a) cyclopentene, because reaction is endothermic, meaning that cyclopentene has lower enthalpy
b) cyclopentene, because reaction is exothermic, meaning that cyclopentene has lower enthalpy
c) pentadiene, because reaction is exothermic, meaning that pentadiene has lower enthalpy
d) pentadiene, because reaction is endothermic, meaning that pentadiene has lower enthalpy