After being recognized as players of an official sport in 2001, Ultimate Frisbee athletes have embraced many new competitive opportunities.


Select the answer that identifies the type of clause used in the sentence and the word being modified.

adverb clause; have embraced
adverb clause; recognized
adjective clause; sport
adjective clause; athletes

I think its D since it modifies the noun, Ultimate Frisbees but i think C could be right too