What Is the Underlying Molecular Cause of Huntington Disease

What is the underlying molecular cause of Huntington disease?

A) The binding of a normal protein to a mutant protein making it cytotoxic.
B) Two mutant proteins in combination produce a toxic precipitate.
C) Normal proteins fold the wrong way, creating plaques that are cytotoxic.
D) mRNA molecules are degraded before they can be properly translated.
E) tRNA molecules fail to bind strongly enough with their associated amino acids.