The War Between Macedonia and Persia Began Because

The war between Macedonia and Persia began because:

A) Philip declared war on Persia in revenge for an act by Persia a century years earlier.
B) Alexander the Great was a military genius and realized he could enrich Macedonia at the Persians' expense.
C) The Macedonians were in a state of famine and launched an invasion in the attempt to acquire good agricultural lands.
D) There was wide suspicion that Alexander had murdered his father, and Alexander realized that he would not be tried for the crime during a time of war.