Answer:
A) Like MLB with steroids, NASCAR fears that if they don’t act to prevent the use of illegal substances, the federal government will step in and regulate their league.
Step-by-step explanation:
Steroid use became widespread in MLB and the league decided to do nothing about it until Congress started their own investigation in 2005, decades after mass use of steroids was made public in books and other investigations. Congress used the 1950s investigation of television quiz shows as precedent for their baseball investigation.
Using altered fuel would be an equivalent of car steroids, and Nascar was afraid of being investigated about it.