Which one of the following phyla is correctly matched with its two general characteristics?
A. Mollusca - Normally oviparous and development through a trochophore or veliger larva
B. Arthropoda - Body divided into head throax and abdomen and respiration by tracheae
C. Chordata - Notochord at some stage and separate anal and urinary openings to the outside
D. Echinodermata - Pentamerous radial symmetry and mostly internal fertilization
