Dear 100 Hour Board and The Unknown Soldier,
You asked in Board Question #17674 why only prophets were called, and then apostles and prophets. Some speculation in addition to Pa's:
Apostles are called to be special witnesses of Christ. Perhaps they couldn't properly testify or witness something that hadn't yet occured. Prophets wouldn't have the same difficulty preaching of Christ, since they are expected to make <I>prophecies.