GMATFIGHTER wrote:
Astronomers of the late twentieth century discovered several distant, planet-like objects orbiting the sun,which has led to heated debates over which of these objects are deserving the classification "planet."
a) which has led to heated debates over which of these objects are deserving
b) leading to heated debates over which of these objects deserve
c) which has led to heated debates over which of these objects should deserve
d) leading to heated debates over which of these objects
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