In a science experiment, you make foam by adding 1 tablespoon yeast and 3 tablespoons water to every 8 tablespoons hydrogen peroxide.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

i would say

c) a core temperature of only ten thousand kelvin