"Nurses should not provide a treatment if there is any ______________ about whether the client understands and is capable of consenting. This applies whether or not there is an _____________, or even if the client has already consented. It does not ________________ if a substitute decision-maker has consented."

a) Ambiguity; emergency; matter
b) Confusion; option; affect
c) Clarity; exemption; matter
d) Certainty; alternative; concern