In 2009, Liu et al. (2009 ) examined whether experiences of current emotional maltreatment predicted the development of new episodes of depression in vulnerable young adults followed for 2 )5 years. This type of research design is called:

During Bowlby's ________ stage of attachment, infants and toddlers actively seek to be near their favored caregiver for support and for confidence to explore new environments

Fill in the blank with the appropriate word.

Approximately how many teenage girls between the ages of 15 and 19 become pregnant during the year of 2010?

A) about 100,000 B) about 300,000 C) about 700,000 D) about 1,000,000