(i) References provide objective information about a job candidate
x
(ii) Written references help to minimise the inaccuracy of references
x
(iii) Personal references are particularly valuable in assessing the qualities of a candidate
x
(iv) At least two employer references are desirable
x
Rationale: Two employer references provide necessary factual information and comparison of views (to minimise bias). The other options are untrue: option (i) because references are highly subjective and/or deliberately limited; option (ii) because people can be more cautious or less honest in writing than on the telephone; option (iii) because personal references are selected to be supportive (you can choose your friends in a way you can't choose your employers!)
