Delta One Business Class - LA to Paris - which seats with a toddler?

We (3 adults & 1 toddler) will be flying in business class from LA to Paris on the Delta Airbus A350-900v3. I'm trying to figure out the best seats for us. Do all B/C middle seats have partitions that can come down? I was thinking seats 7A and 8A/B/C. What do you think is best? Thanks!