Q780216 - Prefeitura do Rio de Janeiro - RJ - 2017 - Prefeitura do Rio de Janeiro - Professor de Inglês

Based on text, an adapted forum discussion, answer question below.

When Dianne says “…but now I'm out of reliable materials" she means that:

a) she no longer has any good resources
b) she does not trust materials anymore
c) she is tired of the books she uses
d) she finds it difficult to choose books