The author mentions that most foreign mission boards were exclusively male most probably in order to A. Contrast foreign mission boards with the boards of secular organizations sending aid to China. B. Explain the policy of foreign mission boards toward training Chinese women in medicine. C. Justify the preference of foreign mission boards for professionally qualified missionaries. D. Help account for the attitude of foreign mission boards towards sending single women missionaries abroad. E. Differentiate foreign mission boards from boards directing parish work at home.