"Human Computer Interaction (HCI) is concerned with every aspect of the relationship between computers and people. The annual meeting of the British Computer Society's HCI group is recognized as one of the main venues for discussing recent trends and issues. A broad range of HCI related topics are covered, including user interface design, user modelling, tools, hypertext, CSCW, and programming. Both research and commercial perspectives are considered, making the event essential for all researchers, designers and manufacturers who need to keep abreast of developments in HCI. " (Catálogo de Publicações da Oxford University Press, Engineering, April to June 1994) Assinale a alternativa que corresponde ao referente do pronome relativo em destaque a seguir: Both research and commercial perspectives are considered, making the event essential for all researchers, designers and manufacturers WHO need to keep abreast of developments in HCI. a) research and commercial perspectives b) developments in HCI c) interface design, user modelling, tools, hypertext, CSCW, and programming d) recent trends and issues e) all researchers, designers and manufacturers