The answer is C just did the test :)
The answer is more than likely A. present progressive form.
Answer:
B) She ruled the bright clouds that gleam in the summer sky and caused them to pour their showers on meadow, forest, and mountains.
Explanation:
This option seems to be the correct one as it gives the information in a
very articulated, and concise way. Also, the option is properly punctuated. Removing "where the mountains were" to just make it "mountains" makes the most sense and is more appropriate