The Golden Age of Greece was the time period from 500BC - 300BC.
The Life of Alexander the Great was from 356BC - 323BC. Although this occurs within the Golden Age of Greece time period, the Golden Age of Greece started much earlier than the birth of Alexander the Great.
The Hellenistic Age was the time period from 323BC - 31BC. The Hellenistic Age started from the death of Alexander the Great, and lasted until the emergence of the Roman Empire.
The Greco-Roman Age was the time period from 332BC - 395AD. Although this era overlaps with the Hellenistic Age, there is no option other than A which has this order.
These are the nervous system and the endocrine (hormone) system. These systems regulate body processes through chemical and electrical signals that pass between cells.
