TO AVOID POISONING BY A BUILDUP OF CO GAS. This is because the detectors help sense when there is too much co gas, and it alerts you if there is because it can be poisonous.
Answer: D) changes in schooling
Explanation: Changes in schooling does not necessarily have to change the parent-adolescent relationship.
Hope this helps! :)
Answer:
One difference between the Rhesus system and the ABO group system is that Rh negative people don't usually possess antibodies against RhD (unless they have been previously exposed to it), whereas in the ABO group system if the antigen is absent from the red blood cells.
Here is the link to read more :)
https://www.mydr.com.au/tests-investigations/blood-typing