The answer would be the last choice which is to maintain a positive attitude. Maintaining a positive attitude enables the person to view things positively where as when he or she experience mistakes, they will likely view them as a way where it wouldn't affect them negatively. That is why the right answer to the question above is the last option.
When you combine flour with liquid and stir or knead, the proteins in the flour form gluten. The gluten in the flour develops and becomes strong and elastic, forming a network of tiny air cells.