In Gortown, there are many shops that sell postal stamps as one of the items available at the counter. Yet Gortown also has two major post offices, which offer a variety of services. One of the post offices is open 24 hours a day. It is strange that people continue to buy stamps at the shops when the post offices are available.Which of the following is an assumption made in drawing the conclusion above?

About a third of the questions that appear in the GMAT verbal section are critical reasoning questions.Typical questions that appear in critical reasoning (GMAT CR) include strengthening an argument, weakening an argument, identifying the assumption of an argument, mimic the reasoning, identify the reasoning, conclusion, inference, bold faced statements, and evaluating an argument.

Each of the critical reasoning questions is based on a short argument, a set of statements, or a plan of action.