Which of the following developments can be most directly attributed to portuguese and spanish state sponsorship of maritime exploration in the late fifteenth century?
1. improvements in european geographic knowledge of africa and the indian ocean.2. improvements in europeans’ ability to prevent the spread of infectious diseases.3. religious divisions in european related to the protestant reformation4. the development of theories of natural rights and representative government.

answer: improvements in european geographic knowledge of africa and the indian ocean

(happy to )

explanation:

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:

your answer is a hope this