Using the expression $$2d \sin \theta = \lambda$$, one calculates the values of d by measuring the corresponding angles $$\theta$$ in the range 0 to $$90^\circ$$. The wavelength $$\lambda$$ is exactly known and the error in $$\theta$$ is constant for all values of $$\theta$$. As $$\theta$$ increases from $$0^\circ$$,

A

the absolute error in d remains constant.

B

the absolute error in d increases.

C

the fractional error in d remains constant.

D

the fractional error in d decreases.