Why are carbon dioxide concentrations expected to increase? A) Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected
to increase.
B) Carbon dioxide concentrations are expected to increase, because of an increase in agriculture.
C) Carbon dioxide concentrations are expected to increase, because more land will have to be
cleared for increasing populations and agricultural use.
D) Carbon dioxide concentrations are expected to increase, because the amount of vegatation cover
and hence photosynthesis which reduces it continue to decrease.
E) All of the above
Please select the best answer from the choices provided

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.