The domestication of plants and animals is a hallmark of
select one:
a. the hominids.
b. homo erectus.
c. the paleolithic era
d. the neolithic era.
e. the first homo sapiens.

The domestication of plants and animals is a hallmark of the neolithic era - D. This was the time when humans first started domesticating different animals and more importantly, started growing crops whichenabled them to start living on one location and staying there for longer times. 

B. Inorganic materials can form organic molecules under the right conditions.

Explanation:

The Miller-Urey experiment provided the first evidence that organic molecules needed for life could be formed from inorganic components.

Source: Khanacademy