How missing the core of the argument can get you to select the trap answer choice (B)
- Verovia exports millions of tons of coal (more than any other country), but also imports hundreds of thousands of tons.
- The imported coal is the same variety as what's produced domestically.
Why import what you already produce?
Geographer’s explanation: Coal is mined in the east, but there is demand in the west (far away). This implies that it's probably more efficient to import coal to the west from outside the country than to ship it from the east.
We need to support the geographer’s explanation, which hinges on the idea that it’s impractical to ship coal across Verovia from east to west, so it makes sense to import it for western cities instead.
Quote:
...while most coal is mined in the eastern part of the country, there is demand for coal in several cities on the opposite side of the country, hundreds of kilometers away.
We already know geographer finds the distance between the two points (point of production and point of demand) to justify the idea of exporting and importing coal. Now we need to find a new piece of information that strengthens this idea, that hey it's better to just import/export coal than move it from east to west.
A. Verovia’s mountainous interior is impassible for most of the year.
This gives us another reason, besides distance already cited by the geographer why domestic coal can’t easily be transported from the eastern mines to western cities.
If the interior is impassible, then sending coal cross-country is difficult, even if it's the same variety and even if Verovia produces more than enough coal.
This strengthens the geographer’s explanation.
But wait, “what if the mountains aren't in the transport path?”. The phrase “Verovia’s mountainous interior” strongly implies the mountains are centrally located, i.e., between east and west — otherwise, it wouldn’t be referred to as the interior of the country.
So (A) strengthens the geographer’s claim by making the internal transport difficult or infeasible.
B. Gorosco, the third-largest coal producer in the region, borders Verovia to the west.
This might seem helpful, but it’s weaker than (A) for two reasons:
It tells us that coal is nearby, but doesn’t explain why Verovia would need to import it if it can transport its own coal. The geographic proximity of Gorosco doesn’t by itself justify importing unless we already know domestic transport is difficult.
So while tempting, (B) doesn't explain why imports are necessary. (B) at best gives us why, if it was difficult to transport coal, you could import it from the west, which is not at all what the argument is about.