Answer:
Por que
Donde
Como
Que
Step-by-step explanation:
Por que-why
"Why are there three laboratories?"
Donde-where
"Where are the there three laboratories?"
Como-how
"How are there three laboratories?"
Que- in this case would mean so or that.
"That/So there are three laboratories?"
You wouldnt use Cuanto, verdad (the only way you could use verdad is if you put que after it meaning "There are three laboratories right?") De donde, and Cual.