How Do Parvoviruses Solve the Problem of Replicating the Ends

How do parvoviruses solve the problem of replicating the ends of linear DNA molecules?

A) They do not have a double-stranded DNA genome.
B) They circularize their genome so that there are no ends.
C) They use a covalently bound protein as a primer.
D) They have self-complementary ends that serve as primers.
E) They encode a special DNA polymerase that can replicate ends of DNA.