Why use more than one kind of source in a presentation?

Which is an example of finding common ground when addressing a counter argument? a. products with genetically modified organisms (gmos) in them are frankenfoods that are unnatural, dangerous, and foul tasting. b. it’s really not important that some people feel texting while driving isn’t a big deal; it’s a fact that it’s dangerous and should be illegal. c. while both sides agree that processed foods are more convenient, the damage they do to a person’s health should not be ignored. d. testing on animals has produce several lifesaving vaccines and medicines that have saved countless human lives.

[1] when the twins grew up, they continued to fight. [2] one day they decided to hold a contest to determine who was stronger. [3] though they tried to defeat each other in many different ways, neither one could win. [4] on the last day, they fought with weapons. [5] using a deer antler, the right-handed twin overpowered his brother, and he threw him off the edge of the earth. [6] today, the right-handed twin lives in the sky-world, and the left-handed twin lives in the dark underworld. [7] they rule the earthly world of men together.

Which question would be most to ask when analyzing opportunities for women during the historical context of this passage