1. Which sentence is written correctly?

a. The butterflies were covering the windshield. I wanted to admire their beauty; but the way they covered the car was more like a horror movie.

b. The butterflies were covering the windshield. I wanted to admire their beauty, but the way they covered the car was more like a horror movie.

C. The butterflies were covering the windshield, I wanted to admire their beauty; but the way they covered the car was more like a horror movie.

d. The butterflies were covering the windshield: I wanted to admire their beauty but the way they covered the car was more like a horror movie.​