Question

1. why might a teacher be happy to hear her students disagree about whether a particular novel is worth reading?

different perspectives help students understand the book.
when students argue, teachers can take a break.
the argument means they actually read the book.
students should care about the books theyre assigned.

Explanation:

In an educational context, when students have different perspectives (disagree) about a novel, it shows they are engaging deeply with the text. Different viewpoints can lead to a more comprehensive understanding of the novel's themes, characters, etc. This is in line with educational goals of critical thinking and in - depth comprehension.
The option "When students argue, teachers can take a break" is a rather trivial and un - educational reason. The option "The argument means they actually read the book" only focuses on the act of reading, not the educational value of the disagreement. The option "Students should care about the books they’re assigned" is more about the attitude of caring rather than the educational benefit of the disagreement itself.

Answer:

Different perspectives help students understand the book.