Which of the following is true about a thermonuclear reaction:

A- The rxn will always have 3 intermediate steps
B- The reaction will have low activation energy
C- The reaction will always be 3rd order
D- The reaction is always spontaneous

A little confused because not all thermonuclear reactions are the same nor do all of them have the same activation energy. I would go with D with the caveat that many spontaneous reactions still require something to "get them over the hump of the activation energy" before they start.