<span>1-Medicines that help prevent diseases
2-Medicines that fight pathogens
3-Medicines that relieve pain & other symptoms
4-Medicines that manage chronic conditions, help maintain or restore health & regulate the body's system.</span>
The excerpt is from Of Plymouth Plantation, the journal by William Bradford who was the governor of Plymouth Colony in 17th century. It is the description of Bradford's account on the Indians named Squanto and Samoset and how they helped the Pilgrims to negotiate with Indian tribe chief. The excerpt shows that the Europeans were strangers for the Indians until the writing recalls the story of two aforementioned characters. They didn't understand the Europeans first and they were somehow trying to be careful. Therefore, the correct options are guarded and wary.
The answer is A, because you don't want those extremely dangerous chemicals to harm or even kill a living person/pet.
Hope this helps and have a nice day:)
