With of the following statement would best be classified under the geography theme of region ?

a. humans have been busy transforming the environment of europe and asia for centuries
b. russia and parts of central asia are often grouped together because until recently russia ruled much of this area
c. the three semitic religions-christianity, islam. and judaism- all developed in eurasia
d. eurasia is a very large —it’s land area covers nearly a quarter of the globe