Alexander III of Macedon (Greek: Αλέξανδρος Γ΄ ὁ Μακεδών; 20/21 July 356 BC – 10/11 June 323 BC), commonly known as Alexander the Great
C. Less Food Crops were being grown.
My conclusion, given the paragraph given, is that the Belgians likely made the choice given rubbers value to plant rubber trees instead of food wherever practicable.
200 miles, I am sure that this is the correct answer.