Streams or rivers can erode the land surface area down to the elevation found at the mouth of the stream. this elevation is called

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

Summer months are the wettest.

Ithink the answer is either a , c or d