Which Family Is LEAST Likely to Co-Sleep

Which family is LEAST likely to co-sleep?

A) Anna and Yuri, who subscribe to Erikson's ideas
B) Yuto and Rong, who live in Japan
C) Pilar and Richard, who think babies should learn self-reliance at an early age
D) Joseph and Hilary, who want to do the opposite of what their middle-class European American parents did with regard to sharing a bed with children