This is the name of the practice of the Catholic Church- involving payments for the remission of a sin- that was part of Martin Luther's Protestant Reformation of the 1500s.

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration

i believe your answer is d)

there were 6 major base camps.   the base camps were located in alva, fort reno, fort sill, the madill provisional internment camp headquarters, mcalester and camp gruber.

the answer is choice (b)