What are benefits & challenges of increased immigration

Explanation:

Increased immigration brings many benefits and challenges to a society. One of the main benefits is a rejuvenation of the workforce. In many countries in the developed world, the aging population has created a crisis due to a shortage of workers. Immigrants can help solve this problem.

Some of the challenges brought by immigration are assimilation into society and education level. Some countries address the first problem with generous and easy to access assimilation courses. Countries like Canada have a special system that  is designed to attract qualified and educated immigrants.

the answer will be b