The correct answer is: B. proper, face
The word “proper” means “correct, suitable, or appropriate.” In this context, it means that we need to take the necessary precautions to avoid problems in our industry. If we do not take proper care, we will likely face a grave problem.
The other options are not as appropriate in this context. The word “normal” does not convey the sense of urgency that is needed in this situation. The word “adequate” suggests that we could get away with taking less than the necessary precautions, which is not the case. The word “intensive” suggests that we need to take extreme measures, which is not necessarily the case. The word “preventive” is similar to “proper,” but it does not have the same sense of urgency.
Therefore, the correct answer is B. proper, face.