Roundworms make up the phylum nematoda.
Roundworms nearly all puppies and kittens have roundworms.
Nematoda infests nearly all puppies and kittens.
What infests nearly all puppies and kittens?
Options:
(a) insects
(b) Nematoda
(c) heat or cold
(d) water
(e) hay fever
(f) bacteria
(g) parasites
(h) the flu