The correct answer is D. Disputable.
Heretical is an adjective that means “holding or believing opinions that are contrary to what is generally accepted as true or
right.” It is derived from the Greek word hairesis, which means “choice.”Fiery is an adjective that means “having or showing a strong and intense emotion, such as anger or passion.” It is derived from the Latin word flamma, which means “fire.”
Corrupt is an adjective that means “having or showing a willingness to act dishonestly in order to gain personal advantage.” It is derived from the Latin word corrumpere, which means “to destroy.”
Impious is an adjective that means “not showing proper respect for God or religion.” It is derived from the Latin word impius, which means “unholy.”
Disputable is an adjective that means “open to debate or argument.” It is derived from the Latin word disputare, which means “to argue.”
Of the four options, only disputable is a synonym of heretical. The other three options have different meanings.