Identify the factor relevant in each investigation ?

yes

Explanation:

Therefore, it is necessary to examine all underlying factors in a chain of events that ends in an incident. The important point is that even in the most seemingly straightforward incidents, ...

nope, but i have cleaned my brush in my cup of not as potentially harmful but nevertheless, very upsetting for scottish/british folks. especially if you've used the last teabag for it

explanation:

there could be something in that . . i am indeed an old scottish man!

there's a bit of bolshie-ness with it too though. i won't let go of the old ways . . tea and whisky . . whether the young whippersnappers like it or not!

d, i believe because of it's activity level