Which of the following is an example of a designated foreign terrorist organization?

A designated foreign terrorist organization is a group that has been officially recognized by the U.S. government as being involved in premeditated, politically motivated violence perpetrated against non-combatant targets, typically aiming to intimidate or coerce a government or society. Al-Qaeda fits this definition, having been responsible for numerous terrorist attacks, including the infamous September 11 attacks in 2001.

The designation of foreign terrorist organizations is a way for the U.S. to take actions such as imposing sanctions and curtailing funding that could be used to support their activities. Al-Qaeda's activities have been globally recognized as terrorist threats, leading to its designation as such. This status not only impacts the group’s operational capabilities but also mobilizes a concerted international effort to combat its activities.

In contrast, the other options provided lack the characteristics of a designated foreign terrorist organization. Organizations like the Peace Corps and the World Wildlife Fund are humanitarian and environmental groups, respectively, which serve entirely peaceful missions and do not engage in acts of violence or terrorism. HELF, which is less well-known compared to Al-Qaeda, does not qualify as a recognized foreign terrorist organization in the same context.