Choose the sentence with correct use of the gerund phrase:
A. Running in the morning, the sunrise was beautiful.
B. Running in the morning, the beauty of the sunrise was breathtaking.
C. Running in the morning, the sunrise to be beautiful.
D. The morning was beautiful, running to the sunrise.
The correct form is "Running in the morning, the beauty of the sunrise was breathtaking," using a gerund phrase as the subject.