Answer:
The correct answer is option B. The disagreement over which group controls which territory and resources.
Step-by-step explanation:
The major cause of worldwide conflict during the 21st century remains the same over who controls which nation and what resources. The governments and countries who were rich and wealthy, wanted maximum control over the resources of the countries who were underdeveloped.
The rich and developed countries wanted to add more to their territory and already oozing wealth. The conflict between wealthier countries was on rise because they wanted to be the one ruling the maximum countries through colonial basis and resource development.