What does this indicate?

Refer to the exhibit.

A network administrator has implemented link aggregation on an HP Comware switch using LACP. The two ports are functioning at the data link layer between the Comware switch and its neighboring switch. The administrator executes the display link-aggregation verbose command and notices the flags shown in the exhibit.

What does this indicate?
A . The links are up, but both links are blocked by LAC
C . The links are up, but are blocked because they are using duplicate operational keys.
D . The links are up, but LACP negotiation has failed on them.
E . The links are up, but LACP is not configured on this link aggregation.

Answer: D