What Factors, Besides Spiritual Ones, May Have Influenced Philip Duke

What factors, besides spiritual ones, may have influenced Philip Duke of Hesse and other princes to adopt Protestantism?

A) Rulers of smaller principalities tended to be more progressive and thus choose Protestantism.
B) They likely desired to fill their own coffers with the wealth of the rich monasteries.
C) Since most secular rulers were literate, they naturally were drawn to Protestantism.
D) Princes like Philip often employed humanists in their courts; these humanists were instrumental in converting their employers to Protestantism.
E) The papacy was only interested in working with kings; rulers over smaller territories resented this slight and gladly switched to Protestantism.