The views expressed in the passage best reflect which of the following trends in European Christendom? A rivalry for supremacy between competing sects
An effort to resolve internal disputes over doctrine
An indifferent attitude toward a threat to a peripheral region
A willingness to unify against an opposing ideology

Refer to the passage.

"We will build transports to carry four thousand five hundred horses, and nine thousand squires, and ships for four thousand five hundred knights, and twenty thousand sergeants of foot. And we will agree also to purvey food for these horses and people during nine months. This is what we undertake to do at the least, on condition that you pay us for each horse four marks, and for each man two marks. And . . . we undertake to keep, wheresoever we may be, for a year, reckoning from the day on which we sail from the port of Venice in the service of God and of Christendom. Now the sum total of the expenses above named amounts to 85,000 marks. And this will we do moreover. For the love of God, we will add to the fleet fifty armed galleys on condition that, so long as we act in company, of all conquests in land or money, whether at sea or on dry ground, we shall have the half, and you the other half. Now consult together to see if you, on your parts, can accept and fulfil these covenants.” Geoffrey de Villehardouin, knight and historian, Chronicle of the Fourth Crusade and the Conquest of Constantinople