a) chromatin
b) chromosome
c) centromere
d) chromatid

Answer:
[tex]structure \: A \: is \: chromosome[/tex]
[tex]structure \: B \: is \: centromere[/tex]
[tex]structure \: C \: is \: chromotid[/tex]
Explanation:
I believe my answer is correct but I'm not 100% sure. I attached some images that may help!
hope this helps!
pls like if it does help!