Answer: a) Reasonable diligence
Explanation:
Reasonable diligence is defined as the attention,looking after and protection exercise that is expected to be carried out by the reasonable and sage person or organization with standards before indulging in any agreement.It is also regarded as due diligence.
According to the question,as the failure has occurred in healthcare facility which is supposed to practice care as reasonable organization.This scenario found by HHS is related with reasonable diligence.
Other options are incorrect because abuse,avoidance caused willingly and meaningful reasoning is not displayed through the situation of question.Thus, the correct option is option (a).