If you guessed "D" you're right because no one seems to know what caused students at Garden Grove's Pacifica High to feel sick Wednesday afternoon.
According to the fire department, around 12:30 pm the calls started coming in, with dozens of students inside the school's building D saying they felt dizzy and had scratchy throats. Some were even having problems breathing.
Garden Grove Fire took 10 students to the hospital. One teacher and about 40 other students were treated here at the school, with those students then released to their parents.
Investigators, including the Haz Mat team and a health inspector spent hours trying to find what caused everyone to feel so bad but found nothing.
Not bees, pepper spray or gas -- which are just some of the rumors that were going around on campus.
It is important to note though that they believe all the symptoms were REAL.