Spontaneous reactions always result in increased disorder of the system always take place at a rapid rate always release free energy are always exothermic

The correct answer is that it "naturally favor the formation of products".
Spontaneous Reactions is best described as a response that favors the formation of merchandise on the situations under which the reaction is happening. A roaring bonfire is an instance of a spontaneous reaction, for the reason that it is considered to be exothermic (there may be a decrease in the energy of the system as strength is launched to the environment as warmness).