8.
The journeys of Vasco da Gama, Bartholomeu
Dias, and Christopher Columbus became possible
in the late 1400s because of the
A.
support of exploration by the English
government
11.
B.
trade connections established by Ibn Battuta
C. effects of the Atlantic slave trade
D
development of new navigational instruments
and technology

the answer is true!                                          

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.

answer; criterion validity

answer; posthypnotic;