Answer:
Species A, B and C are in the same phylum
Step-by-step explanation:
Organisms are grouped according to a taxonomic hierarchy into a taxonomic rank. Taxonomic ranks include species, genus, order, family etc.
Each taxonomic rank has a hierarchy (as given below)
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Specie
The Specie is the lowest rank and the Domain is the highest. All organisms that belong to a lower rank belong to the same upper rank. For instance, all organisms that belong to the same species belong to the same genus, however, not all organisms that belong to the same genus belong to the same specie.
So in this question, since species A and C are in the same order, that means they are in the same class, phylum...
Also species A and B are in the same phylum, since species C is in the same phylum as A also, it mean all three species are in the same phylum.