Select the most appropriate option to fill in the blank.
The smoke coming out of the factory chimneys was polluting the air, which was becoming a major ________ for the local residents.
- Alaw
- Barea
- Cidea
- Dconcern
Solution & Step-by-step Explanation
In the context of environmental pollution affecting the health and living conditions of the local residents, it becomes a matter of worry or importance. Hence, the word concern fits perfectly in the blank.