The factors that contributed to Yemen becoming a failed state include:
-
The rebel group, Houthis, took control of much of Yemen.
This is a significant factor, as the Houthi movement's rise led to a power vacuum and ongoing conflict. -
ISIS took control of parts of Yemen.
The presence of ISIS further destabilized the situation in Yemen, contributing to the chaos and violence.
The other options provided (the president of Yemen agreeing to let Turkey control the country and the United States forcibly removing the president) are not accurate representations of the main events that contributed to Yemen's status as a failed state.
So, the correct answers are:
- The rebel group, Houthis, took control of much of Yemen.
- ISIS took control of parts of Yemen.