I need help with this question

The populations in Scotland and England are greatly increasing.

Explanation:

Assuming I understood this question correct, using the key, you can see that in 1851, England has many more cities and people than in 1801, especially off the coast and closer to the middle of the nation. It also may be good to mention that while Scotland is also growing, it is growing at a much slower rate than England.

the answer wold be b) travel among nations should be regulated by an international organization

i beleive that d is the right answer