Answer:
The answer is b. have good intentions but no passion.
Explanation:
In the poem "The Second Coming", William Butler Yeats compares a time of crisis to the biblical second coming of Jesus. It's an apocalyptical metaphor, most likely about the second World War.
The lines “The best lack all conviction, while the worst / Are full of passionate intensity” criticize the fact that evil people do have passion, they intensely believe in what they are doing. Good people, on the other hand, lack that same intensity and have little to offer since they are not willing to fight for what they believe in.
