Which Statement Is True of the Kingdoms That Emerged from the Breakup

Which statement is true of the kingdoms that emerged from the breakup of Alexander's empire?

A) The Antigonid Kingdom controlled the entire Greek mainland.
B) The Seleucids in Persia failed mainly because their kingdom was too small and poor.
C) The Antigonids controlled the richest of the three kingdoms.
D) Thousands of Greeks chose to immigrate to the Ptolemaic Kingdom, making Egypt a truly unique society.
E) All three kingdoms lasted until the arrival of the Roman in the 4^th century B.C.E.