Identify the correct incidence ranking from most common to least, as assessed in the strange situation:
a. avoidant :: resistant :: secure.
b. secure :: avoidant :: resistant.
c. resistant :: avoidant :: secure.
d. avoidant :: secure :: resistant.
Question 2
Of the following, the substance that typically CANNOT pass through the placenta to the developing embryo is
a. oxygen.
b. maternal blood cells.
c. sugars, proteins, and fats.
d. viruses.