Willis and Her Colleagues Devised an Everyday Problems Test (EPT)

Willis and her colleagues devised an Everyday Problems Test (EPT) that consisted of written tasks in seven Instrumental Activities of Daily Living (IADL) categories.Then they related older adults' scores on the EPT test and their scores on psychometric tests of intelligence.They found that older adults' EPT scores were ____________.

A) most strongly related to their scores on psychometric tests of crystallized ability
B) most strongly related to their scores on scores on psychometric tests of fluid ability
C) equally strongly related to their scores on psychometric tests of crystallized and fluid ability
D) unrelated to their scores on psychometric tests of crystallized or fluid ability