The passage is concerned with which of the following A. determining the different ways in which current speeds can influence the nesting preferences of female river blennies B. establishing nest orientation as a determining factor in egg laying among female river blennies C. questioning the importance of nest size as an influence on egg laying among female river blennies D. comparing the features of female river blennies that face southeast with those of nests facing in other directions E. examining how female river blennies determine the relative importance of nest size versus nest orientation