One of Your Friends Has Decided to Make It His

One of your friends has decided to make it his life's work to characterize all functional proteins, as he is convinced that all possible amino acid combinations can result in a protein. Is it possible to confirm his hypothesis in this way?

A) Yes, because most amino acid sequences actually produce functional proteins; however, many of these proteins are degraded in cells.
B) Yes, because all possible amino acid combinations result in proteins, although many of these proteins have nearly identical structures.
C) No, because most amino acid sequences cannot produce functional proteins.
D) No, because even though all sequence combinations can result in functional proteins, it would be impossible to characterize all of them.