Answer:
They contain murders and other evil things.
Explanation:
In the given passage, the speaker talks about how the tale about Harun al-Rashid focuses more on the good deeds he did. Just like Disney movies focus on the fairytale stories of the positive side of a story, modern scholars also focus only on the good deed of the Caliph of the Abbasid dynasty.
But what <em>"not always wholesome" </em>means is that even though many people focus on the good side of the story of Harun, it is not the complete story. Harun did bad things, evil deeds, <em>"murders, black magic,"</em> and the like, and all these are not included in this tale.
Thus, the correct answer is the fourth or last option.