Final answer:
Marsha P. Johnson is the drag queen and activist renowned for her significant role in the Stonewall riots and her pioneering work in LGBTQ+ rights, especially through her co-founding of STAR with Sylvia Rivera.
Step-by-step explanation:
The drag queen and activist best known for her activism and role in starting the Stonewall riots is c) Marsha P. Johnson. Johnson was a key figure in the LGBTQ+ rights movement and co-founded the Street Transvestite Action Revolutionaries (STAR) with fellow transgender activist Sylvia Rivera. This organization was pivotal in advocating for transgender rights and provided much-needed support to transgender youths. The efforts of Johnson and other activists led to the foundation of the Gay Liberation Front, the increase in visibility for transgender individuals, and the advancement of LGBTQ rights.