Of the Spanish explorers, who contributed the most extensive survey of the southeast? A. Hernando de Soto
B. Ponce de Leon
C. Pedro Menendez
D. Vazquez de Ayllon

answer; /// (culture);

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

are there any options?