Answer:
c
Explanation:
secondary source created by someone who did not experience first-hand or participate in the events.
"Thus the small differences distinguishing varieties of the same species, steadily tend to increase, till they equal the greater differences between species of the same genus, or even of distinct genera."
<em>Genera</em> is plural for genus.
<em>Genus</em> means biological classification of things that have common characteristics and can be divided into subcategories.
Therefore, the correct answer is "same/similar family common characteristics."
Choice D , The Communist Manifesto
“scatter” should work as one