b. Start building an infrastructure. I need money to conquer!
a. Raise taxes to maximum and sack as many provinces as possible while leaving no troops behind to defend.
b. I continue to build my strength and tech up so I have the advantage.
d. I take stock of the situation and take whatever action shall benefit me more. If that means excommunication then so be it!
d. A crusade? Sounds like the perfect chance to build a crusader empire to me.
c. Use assassins to silence them for good.
b. Building a mighty kingdom whose tech is a marvel.
a. What’s Chivalry?
b. Chivalry. They make much better governors.
c. Chivalry. Exterminating prisoners only hurts my relations!
d. My kingdom is formidable yes, but there’s still much to overcome.
b. Using the only the best troops I form up in a line and fight them man for man, I try to flank and wear him down but try not to incur too many casualties.
a. Use mostly cavalry with a high dread gen, who are vastly outnumbered by the garrison, route the enemy force quickly when they sally.
d. The horde is of no consequence to me. I’ll let them pick off my rivals while I expand elsewhere.
a. After wiping our swords clean we turn and finish the Pope.
d. Alliances cannot be trusted, but they can confuse my enemies and even delay a coming war.
a. Through rampant pillaging, killing, sacking and piracy. When the map is nearly conquered then I begin to think about ports.

So that would be:
b, a, b, d, d, c, b, a, b ,c, d, b, a, d, a, d, a.

So, mostly A. :P