The Following Information Is Available for an Enterprise's Security Investments

The following information is available for an enterprise's security investments as of December 31, 2011:

In June 2012, the enterprise decided to reclassify the Wal-Mart bonds as securities available-for-sale. The bonds had a market value of $31,000 at the time of the reclassification.
What amount of holding gain or loss is immediately recognized in 2012 earnings?

A) $2,000 gain
B) $3,000 gain
C) $1,000 gain
D) $1,000 loss