Final answer:
The quotation is inappropriate as it is overly critical of previous researchers, lacks professionalism, and is informally accusatory.
Step-by-step explanation:
The quotation "Previous researchers bluntly ignored gender as a factor in their study" is not appropriate primarily because it is overly critical of previous researchers (C). This language lacks professional objectivity and uses informal tonality which can be considered unprofessional in academic research settings. Additionally, rather than fostering a constructive critique or discussion, such phrasing may be viewed as dismissive or accusatory, which does not align with scholarly standards of critical review and engagement.