Sentence Correction

Announcing that one of its key successes had been the recent well-received beta launch, the Internet startup claimed it would introduce several new products to the web community during the next quarter.


A
its key successes had been the recent
B
its key successes has been the recently

C
its key successes is the recently
D
their key successes is the recent
E
their key successes had been the recent


Thanks in adv !