Answer:
B) Wheat, apples, and grapes.
Step-by-step explanation:
The east of the Cascades is also known as the "Palouse" or "Inland Empire". It is a an area that stretches from the Mountains' summit to the drier desert to the east.
This area is suitable for the growth of crops which requires little rainfall and was a good region for wheat production.
Other plants such as apples and grapes are also grown in the Inland Empire region.