China’s vast network of dams
has long stood as the country’s primary source of renewable energy, but its interest in building more large hydroelectric generating stations has waned in favor of burgeoning solar and wind industries.
A. has long stood as the country’s primary source of renewable energy, but its interest in building more large hydroelectric generating stations has
B. have long stood as the country’s primary source of renewable energy, but their interest in building more large hydroelectric generating stations have
C. has long stood as the country’s primary source of renewable energy, but interest in building more large hydroelectric generating stations has
D. long stood as the country’s primary source of renewable energy, but its interest in building more large hydroelectric generating stations
E. have long stood as the country’s primary source of renewable energy, but interest in building more large hydroelectric generating stations has
Can you pls explain how C is better. I marked A as answer because its (subject of 2nd clause) can unambiguously refer to China's(China's interest) as no other referent seems logical
I have 1 more doubt, what exactly is the error in D. When I read it, it didn't feel right but I couldn't figure out the exact problem