You are given a sentence in Italian. Your job is to translate the Italian sentence into English.
Q: Invece la reazione è arrivata solo quando il Cancelliere Merkel ha rivelato di essere stata intercettata. Perché?
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
And instead, the reaction really came only when Chancellor Merkel was revealed as being wiretapped. Why so?