2.)the spanish borderlands were located
a.
in present-day spain.
b.
from present-day florida to present-day california.
c.
in present-day south america.
d.
1.)in present-day panama.
what was one effect of the failure to find a northwest passage to asia?
a.
western european nations founded south american colonies.
b.
western european nations stopped trading with asia.
c.
western european nations made use of north american resources.
d.
western european nations abandoned the idea of exploration.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

explanation:

nutelal