Why was it so important for portugal to round the southern tip of africa
a. rounding the southern tip of africa was seen as a possible sea route to india.
b. a main goal of portugal was to maintain control of all land east of the line of demarcation.
c. if portugal beat spain in rounding the southern tip, they would then be seen as a superior naval power.
d. rounding the southern tip of africa would allow portugal to establish more trading posts along west africa.

The correct answer is A. Rounding the southern tip of Africa was seen as a possible sea route to India.

Explanation

In the fifteenth century, Portugal was focused on knowing the African coast with the objective of developing a commercial route to India and have access to its riches through a reliable maritime route for them. The first Portuguese that arrived at the Cape of Good Hope was Bartolome Diaz in 1488. After that on July 8, 1497, Vasco Da Gama left with an expedition consisting of four boats in which about 170 men went, this expedition lasted a little more than ten months in which they surrounded the southern tip of Africa and arrived in India. May 20, 1498. So, the correct answer is A. Rounding the southern tip of Africa was seen as a possible sea route to India.

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.

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