No, His data is not controlled. Being he let the younger siblings answer and they are not his classmates.
Answer:
Lead in
g of blood
grams
Explanation:
Given -
Amount of lead in human blood -
parts per million (ppm)
This is equivalent to
g of lead for each million grams of blood
Numerically, it can be represented as -

Lead in
g of blood
grams
Lead in
g of blood
grams
Judging from what you have here the answer is letter A
Answer:
is the asnwer nervous and behavioral
if not then report me
Explanation: