The Following Series of Reactions Was Done on a Monosaccharide $\alpha$

The following series of reactions was done on a monosaccharide. What information does this give about the monosaccharide?

A) The monosaccharide was in the open-chain form.
B) The monosaccharide was in the furanose form.
C) The monosaccharide was in the pyranose form.
D) The monosaccharide was the $\alpha$ anomer.