One problem faced by Rogoff and colleagues in their cross-cultural studies of children's

memory was that

a. children in some cultures are smarter than children in other cultures.
b. the memory tests they used had to be specific to a culture.
c. some of the cohorts had lived through different time periods and so had very different
cultural experiences.
d. the experiences of children living in one culture may be different from those in other
cultures.
e. some children liked to memorize and other didn't.

d. the experiences of children living in one culture may be different from those in
other cultures.