The influx of immigrants to Europe has created challenges primarily because D immigrants may not have the skills necessary to find work.
While immigration can bring diversity and new perspectives (option B), creating a vibrant multicultural environment, the challenges arise when immigrants arrive without the necessary skills or qualifications that match the job market in Europe. This can lead to difficulties in finding employment, economic integration, and reliance on social support systems, which can create tension and challenges in host societies. Options A and C are less accurate as they suggest a lack of motivation or justification for immigration, which does not reflect the complex realities many immigrants face.