Concept:A flexible constitution is one that can be changed through the same ordinary law-making process.
Explanation:Flexible constitutions do not require any special or difficult procedure for amendment.
They can be altered by a simple majority in the legislature, just like an ordinary law.
This makes the constitution adaptable to changing social conditions and new needs of the people.
Its elasticity helps a developing country to progress without unnecessary legal obstacles.
The constitution can also be shaped by the conventions and customs of national life.
Being easy to manipulate or capable of leading to dictatorship are disadvantages, not advantages.
A flexible constitution is not best suited for a federation, because federal systems need a rigid constitution to protect the powers of different levels of government.
Therefore, the main advantage is the ease of amendment through a simple majority.
Answer:D. can be amended by a simple majority