Explanation:
c. tuberculosis because is a very dangerous disease
Answer: The Value stage.
Explanation: This stage corresponds to the period in which there is an exchange of behavior between the couple; the appearance or physical attractiveness of the scale of values or both members of the dyad is no longer valued and is in this moment when the couple begin to really "know" each other personal facts or tendencies.
15/20=0.75
if we said that each ( child = 0.75 adult )
20 total children num - 9 children in the elevator = 11 children not in the elevator.
11 children * 0.75 adult = 8.25 adults.
that is the math, in real life 8 adults can get in with 9 children.
hope that helps!