A researcher studies the effects of urbanization on lizards in a habitat in a Caribbean island. The hypothesis is that lizards of a certain species in developed areas will be larger than those in pristine wilderness areas because their greater size makes them less vulnerable to predators. For this study, "size" is measured by weighing lizards captured through a random sampling plan. The null hypothesis is that the mean weight of lizards in developed areas is the same as the mean weight in pristine areas. Which best describes the significance level?
a. The probability of concluding that lizards in developed habitats are the same weight as lizards in pristine habitats when, in fact, they are heavier.
b. The mistake of concluding that lizards in developed habitats are heavier than lizards in pristine habitats when, in fact, they are not.
c. The mistake of concluding that lizards in developed habitats are the same weight as lizards in pristine habitats when, in fact, they are heavier.
d. The probability of concluding that lizards in developed habitats are heavier than lizards in pristine habitats when, in fact, they are not.