Question

multiple choice question
why is the central core sometimes called the \old brain\?

• it forms before the rest of the brain in fetal development.
• it comes between the spinal cord and the

ew brain.\

• it can be traced through 500 million years of evolution.

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Explanation:

The central core (old brain) is called so because its evolutionary history spans about 500 million years, being conserved across species. The other options: fetal development timing or its position don't relate to "old" in an evolutionary sense.

Answer:

C. It can be traced through 500 million years of evolution.