Many conflicts occurring in the Middle East today can be directly linked to how the land was partitioned after World War I. The word underlined in the sentence above can best be defined as .

A.

the act of supporting the spread of Islamic values and belief into all aspects of a society

B.

a formal decision that is made by a group of people and carried out with authority

C.

a feeling of dislike or anger cause by the sense of having been poorly treated

D.

a division or separation of something into portions

D.  A division or separation of something into portions.

Explanation:

Based on the given sentence, the main idea of the sentence is that the 'partition" of the Middle East after WWI is in most ways responsible for the emergence and frequency of the many conflicts. This means that the structuring of the land helps/ contributes to most of the turmoil in the nation.

Now, the word "partition" means something or anything that is separated or put into portions, smaller sections, or the changing of its structure and boundaries. It is the division of anything into many pieces.

Thus, the correct answer is option D.