Section: Verbal

49) The program to control the entry of illegal drugs into the country was failure in 1987. If the program had been successful, the wholesale price of most illegal drugs would not have dropped substantially in 1987.

The argument in the passage depends on which of the following assumptions?

1. The price paid for most illegal drugs by the average consumer did not drop substantially in 1987.
2. The supply of illegal drugs dropped substantially in 1987.
3. The wholesale price of a few illegal drugs increased substantially in 1987.
4. Domestic production of illegal drugs increased at a higher rate than did the entry of such drugs into the country.
5. A drop in demand for most illegal drugs in 1987 was not the sole cause of the drop in their wholesale price.
6. No Answer Selected

The only choice that must be true in order to conclude legitimately from the drop in the wholesale price of illegal drugs that the program was a failure is choice 5. If the drop in price was caused by a drop in demand, there is no reason to suspect that there has been any increase in supply caused by drugs entering the country.