Final answer:
The transgender model known for her appearance on RuPaul's Drag Race is Carmen Carrera.
Step-by-step explanation:
The subject of this question is the transgender model known for her appearance on and open critique of the show RuPaul's Drag Race. The correct answer is a) Carmen Carrera.
Carmen Carrera is a transgender model who gained recognition for her appearance on the reality TV show RuPaul's Drag Race. She has also been vocal about her experiences as a transgender individual and has used her platform to advocate for LGBTQ+ rights and raise awareness about transgender issues.