Read the following selection from the article.
Embracing chemistry helps us
appreciate our amazing world and not
fear it. I wanted to be a chemist to
solve problems. My specialty
toxicology, helps create a safe world.
Arguably, toxicology is the oldest
scientific discipline, as the earliest
humans had to recognize which plants
were safe to eat
What conclusion is BEST supported by the
paragraph above?
A
The study of toxicology has not significantly
changed throughout human history.
B
Toxicology is primanly the study of which plants
are safe for human consumption
С
People who study toxicology learn what food is
sale by studying early humans.
D
Some understanding of toxicology has always
been necessary for human survival

Based on the context and key points, such as "... as the earliest humans had to recognize which plants were safe to eat," answer D is the best choice. We know toxicology would have had to change significantly because it is a science and science always evolves, so A is out. Toxicology is NOT the study of just "safe" plants, so B is out. Lastly, those who study toxicology do not all study foods, so C is out.