B. It was a center of trade on the Mediterranean
For more than 1000 years Constantinople was the capital of the Byzantine empire. It had an strategic position for trade, and many trading routes passed through there. It was the biggest and richest city in all of Europe.
Lack of people able to run the court
Well one way they where effected was with the geography and lay of the land many villages could not interact with each other easily. This caused trouble for villages cause their was some places with material that others could not get to without trade.
Nowadays the internet is a powerful tool for anyone. Politicians take advantage of it as well, and for this reason, all of the alternatives apply.
They use it to generate donations for campaigning, to support the party, and even charitable donations.
They also use it to organize supporters, create communities where they can interact, show support, discuss ideas, etc.
Finally, they also use it to solicit support, showcasing their ideas, trying to reach as many people as possible in order to increase their supporting base.
I believe you meant (Goal and not "gold") if so, the answer is-to invade the North from the West