A seminal experiment (shown below) was done by Christian Anfinsen in the early 1960s. The experiment involved using common denaturants to unfold the protein RNAse and determine conditions that allow it to regain activity. It can be concluded from the experiment that:
a) Folding can occur in a cell or in a test tube.
b) Chemical agents can prevent folding.
c) Folding can be disrupted by inactive, metastable states.
d) All of the above.