We might deduce from this that

An assumption is something taken for granted, a supposition. These assumptions
are accepted as the truths upon which the discipline is based. Stated another way, a
discipline’s defining elements—its theories, concepts, and methods—are simply the
practical manifestations of its assumptions. Grasping the underlying assumptions of
a discipline as a whole provides important clues to the assumptions underlying the
writings of its experts on a particular problem

a. Assumptions shape the discipline’s theories, concepts, and methods.
b. Assumptions might prove helpful in creating common ground because
disciplines may share the same assumptions.
c. None of the statements above is correct.
d. Both of the statements “a” and “b” are correct.

d. Both of the statements “a” and “b” are correct.