Answer:
las respuesta es la letra: b
Amphetamine like adderall,vyvanse are weaker because they do not have a methyl group. adding a methyl group to amphetamine makes N-Methylamphetamine. a Methyl group makes it much more potent therefore you need less to get high and it is much more powerful.
for more info go to
https://psychonautwiki.org/wiki/Adderall
https://psychonautwiki.org/wiki/Meth
Bone, which is made of collagen, which is strenghtened by calcium phosphate
Must be C as the others just don’t sound right
