“…1 Uspenskii [76] and Valov and Gutev [34] showed that C-spaces play an important role in the selection theory of set-valued maps. Their results and other questions concerning C-spaces and weakly infinitedimensional spaces were surveyed in [68]; see also the papers [8-10, 15, 18, 20, 33, 37, 40, 41, 46-49, 60, 61, 63-67, 73, 75, 77, 80], which are not directly related to the problems considered in this paper.…”