Answer:
The conclusion of the question is false, and Marcos has been taught something wrong, or he understood it in a wrong way.
Expalanation:
If the foreign market is much larger and lucrative than the domestic market, and 99% of the growth in exporting firms was small and medium-sized, Marcos, as a future small business owner, should definitely focus on the foreign market, because the economic evidence is telling him to do so.