The social changes in Maasai society are that ___________________________.

The correct option is A both (a) and (b)
With the coming of modern times, there have been some significant changes in the society of pastorals. Some of them have been mentioned below:

• There developed a distinction between wealthy and poor pastoralists. Chiefs had both pastoral and non-pastoral income. Often they accumulated wealth either through trade or by indulging in money-lending activities.
• The life of the poor pastoralist who depended only on livestock was badly affected. Many were forced to give up their old occupation and had to live as charcoal burners or by seeking jobs in towns.
• In massai community, traditional difference between based on age between elders and warriors have been disturbed.