In the article, the author discussed the difficulty that the United Nations had in drafting a definition of terrorism.

Why was there so much disagreement on the issue?

In United Nations discussions, many states supported al Qaeda and opposed the US response in Afghanistan.
Legitimate organizations have been labeled “terrorist” even when violence has not been their primary method of enacting change.
The terrorist label is controversial, and the characteristics are difficult to define.
On many occasions, people have disagreed on whether certain movements were terroristic.
The United Nations is concerned only with social matters, and not political ones.

Legitimate organizations have been labeled "terrorist" even when violence has not been their primary method of enacting change.

The terrorist label is controversial, and the characteristics are difficult to define.

On many occasions, people have disagreed on whether certain movements were terroristic.

Explanation:

B. Legitimate organizations have been labeled “terrorist” even when violence has not been their primary method of enacting change.

C. The terrorist label is controversial, and the characteristics are difficult to define.

D. On many occasions, people have disagreed on whether certain movements were terroristic.

Explanation:

supplies had to travel a long distance across water on ships that were often attacked, so they did not reach europe