Okay so none of them actually contain the schwa sound. The closest one to it is precision and thats pronounced (this is from google) prəˈsiZHən
When making an inference, the reader should be sure to support the inference with evidence. Hope it helps :)
Answer:
Jenny spent 25 minutes reading her book.
Explanation:
1/3 of an hour is 20 minutes.

1/4 of an hour is 15 minutes.
20+15=35
60-35=25