Another of those many flexible Catholic positions...
I take that to mean that it is acceptable to hold either view in Catholicism. After thinking about it, I am now wondering why it is not required that all Catholics believe that John the Baptist was sinless. What is your interpretation of this:
Matt. 11:11 : I tell you the truth: Among those born of women there has not risen anyone greater than John the Baptist; yet he who is least in the kingdom of heaven is greater than he.
Presumably, this elevates John over Mary, or at least puts them on equal footing, and yet how could this be so if she was sinless and he was not?
this elevates John over Mary
Not really, Jesus has prophets in view in that passage, and not His Mother.