Please help with this:

Suppose in recent years, it has only rained an average of 5 days a year. The weather forecast, which has an accuracy of 90%, predicts rain for tomorrow. What is the probability of rain tomorrow?

A: <1%

B: between 5 and 15%

C: between 15 and 80%

D: between 80 and 90%

E: > 90%

Thank you!