In the Fourteenth Century, the 'Calculators' of the University of Oxford

In the fourteenth century, the 'Calculators' of the University of Oxford argued that:

A) Objects of different weights fall at a uniform level of acceleration.
B) There was no such thing as a vacuum in space, in spite of Aristotle's claims.
C) 'Arabic' numerals were more useful in establishing valid calculations than Roman numerals.
D) Aristotle's treatises had been so badly translated from Arabic documents that they were impossible to decipher.