Take a look at the item again:
Despite her parents' disapproval, (A)
Tran continues to date Charlie.
(B) A nice young
man (C)
whose only fault is not being born Vietnamese.
You wanted to do this:
Despite her parents' disapproval, Tran continues to date Charlie. A nice
young man. Whose only fault is not being
born Vietnamese.
Adding a period after man creates a fragment. Whose only fault is not being born Vietnamese is a subordinate clause and cannot stand alone as a sentence. Reconsider your options.
You might want to review the rules.
Go back to the sentence to try again.