You are asked to rate how likely it is that a student, Steve, will pass an upcoming exam. You are told that, in the past, the "pass" rate for this exam is 30%. Which of the following statements about your rating is MOST LIKELY to be true? You will: a) use base rates in your decision.
b) imply a cause-and-effect relationship between the pass rate and the student being judged.
c) say the chance of the student passing is 0.8.
d) ignore the base-rate information.

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

this doesn't support enough information to answer the question.