Which Couple Is MOST Likely to Find the Transition to Parenthood

Which couple is MOST likely to find the transition to parenthood a total relationship disaster?

A) The Okafors, who argued a good deal before the baby was born
B) The Zhaos, who had clearly defined gender roles before the baby was born
C) The McFarlands, who were in their forties when their baby was born
D) The Pearlmans, who just adopted an older child