Final answer:
The changes that were part of the League of Nations' mandate system include Turkey's independence, Iraq's independence, and Syria being placed under French control.
Step-by-step explanation:
The changes that were part of the League of Nations' mandate system include:
- Turkey was granted independence: The Treaty of Lausanne in 1923 provided for an independent Turkey to succeed the Ottoman government.
- Iraq was granted independence: Under the mandate system, the administration of modern Iraq was transferred to Britain, which was expected to govern until the country was deemed ready for independence.
- Syria was placed under French control: France received the mandate to govern Syria, while Lebanon was also under French control.
Therefore, the correct options are:
- Turkey was granted independence.
- Iraq was granted independence.
- Syria was placed under French control.