The former territories of the Ottoman Empire were declared to be what class of League of Nations mandate? Designed by the Big Four and...

The territories that had been part of the Ottoman Empire before World War I were made into Class A mandates by the League of Nations after the war.  Therefore, Option A is the correct answer to this question.  Other territories were made into Class B and Class C mandates.  There were no one-year mandates.

After WWI, the victorious powers decided to take the territories of the losing countries.  To make it appear less as if...

The territories that had been part of the Ottoman Empire before World War I were made into Class A mandates by the League of Nations after the war.  Therefore, Option A is the correct answer to this question.  Other territories were made into Class B and Class C mandates.  There were no one-year mandates.

After WWI, the victorious powers decided to take the territories of the losing countries.  To make it appear less as if they had fought the war for territorial gain, they officially made these territories into League of Nations mandates.  In theory, these territories were given to allied countries not as new territory but as places that they would administer temporarily.   The mandates were divided into classes based on how close the League of Nations thought they were to being able to govern themselves.

The Class A mandates were judged to be closest to ready for self-rule.  The former Ottoman Territories were the only places that were placed in this category.  Class B mandates were all former German territories in Africa.  The League decided that the mandatory powers would need to control these places more closely because they were less ready to rule themselves.  Finally, there were Class C mandates, which were deemed very unready to govern themselves. The mandatory powers were told that it was best to administer these territories under their own laws as part of their own territory.  Class C mandates were mostly places in the Pacific Ocean like Samoa and Micronesia.

So, the answer to your question is Option A.  The former Ottoman territories were judged to be almost ready to rule themselves and were therefore classified as Class A mandates.