How Did the ECB's Security Market Program Acquire Greek, Irish

How did the ECB's Security Market Program acquire Greek, Irish and Portuguese government bonds in 2010-2011?

A) By buying those bonds from those governments
B) By buying securities backed by those government bonds and foreclosing on the bonds when the securities were not paid
C) By buying the bonds on the secondary markets
D) By loaning money to private companies which bought the bonds and then used the government bonds to repay the loans