choose the true statements about amyloid fibrils

a. An amyloid fibrils is stabilized by hydrogen bond between small hydrophilic residue.

b. protein that form amyloid fibrils are normally soluble.

c. Amyloid fibrils have high amount of beta-sheet structure.

d. nucleation of amyloid structure may be triggered when two beta-sheet regions from two partially folded proteins associate.

e. protein that convert to an amyloid structure from soluble fibrils.