An Italian map labeled “Mappamundi” (“Map of the world”) is undated, but, based on its contents, was probably drawn sometime in the years 1488 to 1493. The map accurately depicts the western coast of Africa down to the Cape of Good Hope, which European explorers first reached in 1488, but it shows none of the islands of the West Indies visited by Columbus on his first voyage, from which he returned to Europe in early 1493.
Conclusion:
An Italian map labeled “Mappamundi” (“Map of the world”) is undated, but, based on its contents, was probably drawn sometime in the years 1488 to 1493.
Which of the following, if true, most strengthens the argument?
The correct answer to this Strengthen question will provide additional confirmation of the conclusion.
A. European ships of the period required nearly a year to make the voyage to the Cape of Good Hope and back.
How long they took to make the voyage doesn't indicate when the map was drawn.
Eliminate.
B. Columbus published a widely read account of his first voyage immediately after his return.
This choice is interesting.
If Columbus published a widely read account of his first voyage immediately after his return, then mapmakers would have had that information around 1493, meaning that the map was likely created before then, as the argument says.
Keep.
C. European authorities who sponsored expeditions often tried to keep information gained by those expeditions secret for as long as possible.
If anything, this weakens the case for the conclusion by indicating that the map could have been drawn later if authorities succeeded in keeping information secret for years.
Eliminate.
D. A map as complicated as the map in question would have taken a cartographer of the 1400s several months to finish.
This doesn't significantly change what we know.
Eliminate.
E. During his first voyage, Columbus was able to sail from the West Indies back to Europe in less than three months.
How long Columbus took to make the voyage doesn't indicate when the map was created.
Eliminate.
Correct answer: B