Later in history, one of the major greek cities fought off the persians at the tiny seaport town of marathon. most likely which city was it? why?

the three answers (for plato at least) are:

b-condemned sola fida 

d-set rules for establishing seminaries and for educating clerics in the seminaries 

f-recommended moderation in the sale of indulgences and banned the sale of false indulgences 

it proved indian land claims were unjustified.