The 2011 Data Shows That There Was an Overall Decline

The 2011 data shows that there was an overall decline in the proportion of couples with children at home, regardless of marital status in the past decade. This is because

A) the costs of living has increased for Canadian families.
B) worsening economic conditions
C) advances in birth control techniques
D) religious sanctions against larger families in immigrant communities.
E) a decline in fertility and the aging of the population.