Your answer would be B...
A medical practitioner must adhere to certain ethical standards and codes of conduct because he/she cannot make decisions based solely on his own judgement because it might be biased or too subjective. Therefore, a practitioner must abide by the code of ethics because it delivers guidance to the practitioner in addressing common ethical questions and it elucidates the duties and responsibilities of the practitioner.
Answer:
a change from a seronegative to a seropositive condition
Explanation:
B. is your best answer
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