i think d. is the best answer .
Answer:Over time, carbon-14 decays in predictable ways. And with the help of radiocarbon dating, researchers can use that decay as a kind of clock that allows them to peer into the past and determine absolute dates for everything from wood to food, pollen, poop, and even dead animals and humans.
Explanation:
ARCHAEA AND BACTERIA are the simplest organisms without nucleus.
These two organisms are prokaryotes, which means that their cells is not differentiated and they do no have cell membrane bounded organelles. They are both microscopic.
