Answer the following question given this paragraph: 

Vertebrates are a subphylum of the phylum Chordata. Like all chordates, vertebrates have a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail. What other characteristics do vertebrates have? What traits set them apart from invertebrate chordates?.


Q: Vertebrates are a subphylum of what phylum?

 Choices:

- arthropoda

- hydrozoa

- porifera

- chordata

A:
chordata
