Two people lack the same information about an issue.
All of the other ones are good things. D is the only one that is bad.
Random sampling means that members of a 'population' have equal chances of being selected. To carry out this type of sampling, you will need to use a table of random numbers.
Health professionals can enhance their careers by joining professional organizations, you make connections in the field, you gain access to news and information that you may not find in other places, the can help answer questions that you may have about your field.