Final answer:
The correct answer is option b) Hostile.
Step-by-step explanation:
The attitude of the boyars towards Vlad III Dracula during his third reign was b) Hostile.
Vlad III Dracula, also known as Vlad the Impaler, was a brutal ruler who imposed strict laws and punishments on his subjects. He often executed or tortured those he suspected of disloyalty, which led to a hostile relationship with the boyars, who were noble landowners and advisors to the ruler. The boyars were openly critical of Vlad's methods and sought to overthrow his rule, resulting in a hostile attitude towards him.