The correct answer is:

There is no standardisation throughout the organisation

and

There is an implied link between assessment and reward

Rationale: This is a double edged sword: a link between assessment and reward may motivate employees to take appraisal seriously, but can also make it threatening if they fear that they haven't done well.

Moreover, there are other factors in setting rewards - and if there isn't a real connection between a positive appraisal and a meaningful reward, the 'implication' that there is will only undermine the appraisal system. There should be standardisation throughout the organisation. The other options are clearly positive.