the toughest challenges to overcome with artificial intelligence are\nmultiple choice\nimplementation, data…

Brief Explanations:

Artificial intelligence implementation can face hurdles in putting systems into action, dealing with data - quality and quantity issues, and high costs for development and maintenance. These are well - known challenges. Predictive analytics is a goal, not a major challenge. Unemployment is a consequence concern rather than a core AI challenge. Efficiency and user - interface are important but not as fundamental as the data and implementation aspects. Analytics is a part of AI, not a top - level challenge, and groupthink is not a typical major AI challenge.

Answer:

implementation, data issues, and cost