What was most notable about nicolaus copernicus's work

a. he showed the world that mathematics and an understanding of motion and gravity could predict the movements of earth and the sun
b. before he proposed his heliocentric theory most europeans believed that the sun revolved around the earth.
c. before he created the scientific method, european scientists relied mostly on logic and mathematics instead of observation to prove their theories.
d. he published a book before using observation and experimentation to learn what is true, rather than accepting roman catholic teachings or superstitions of the time.

The correct answer is B. Most notable about Nicolaus Copernicus' work was that before he proposed his heliocentric theory most Europeans believed that the sun revolved around the Earth.

In the 16th century, Nicolaus Copernicus published a model of the Universe in which the Sun (and not the Earth) was in the center. The previous hypotheses were maintained since the 2nd century, when Ptolemy had proposed a geocentric model that was used by astronomers and religious thinkers for many centuries.

Copernicus' theory established that the Earth turned on itself once a day, and that once a year it made a complete revolution around the Sun.

the answer is a. since they were a huge producer of cotton and wanted the most money for it.

im not sure on this one