The reason the ECB did not want the Greeks to exit the euro was that

a. Greece was viewed as a valuable member in temporary distress.

b. Greece was viewed as so unimportant that it did not want the perception that countries were leaving for any reason.

c. Greece was a founding member, and political friendships were important to the ECB leaders.

d. Greece was viewed as the first domino in a series of dominos that, if Greece left, it would jeopardize the whole euro system.