Answer:
C
He invaded Austria and Poland.
Before the split in 1054, the Eastern Church and the Western Church view the Pope differently by the Eastern Church recognizes the Pope's full or complete power. The Pope did not want the title as Ecumenical Patriarch and would want the Byzantine emperor to recognize the Pope's power.
I think it means any good deed you do, no matter how small or big, will always matter and be appreciated somehow. You also might think it doesn’t matter now, but maybe doing a small favor helped you immensely now because that person returned it by doing a huge favor for you.
