The least clear illustration of how decisions are generally at the margin would be: (i) A floral shop hiring an additional clerk and opening earlier in hopes of increasing revenues by half. (ii) Eating less whenever the menu is a-la-carte than at an ‘all-you-can-eat’ buffet. (iii) Basing the invasion of Iraq on fears that Iraq was getting ‘weapons of mass destruction’. (iv) Mulling regarding whether or not to eat a fifth cookie encompassing already eaten four. (v) Basing how much more you will study for the final exam on the score you require to earn an A.
Choose the right answer from the above options.