What is the answer to this question​

the unit cube justification suggests that if you have those numbers in the square your answer will be equivalent to the -20 subtracted by 10 which is -10

In other words the answer is D

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.