Answer:
When Stu could not procure all the necessary ingredients to make his famous chili, he decided to make nachos instead.
Step-by-step explanation:
In the English language, procure means to obtain or acquire something. Hence, it is the best word which goes with the statement. As the statement teds to tell that as Stu couldn't get all the ingredients required for making famous chili, he switches on to making nachos.
Other words, such as procrastinate, cannot be right because procrastinate means to delay something.