Transform the simple sentence into a compound sentence.

To his eternal disgrace, he betrayed his country.

A. He betrayed his country is an eternal disgrace.

B. For him betraying his country was an eternal disgrace

C. He betrayed his country and this was to his eternal disgrace.

D. Eternal disgrace was his betraying the country.

Please do not use chat terms. Example: avoid using "grt" instead of "great".