You must rely on research and rhetorical devices, especially fallacies, to support your argument.
a. true
b. false

False, a fallacie is
a mistaken belief, especially one based on unsound argument.

False Explanation: You should not rely on rhetorical devices, because it may appeals to emotion instead of reason and often use fallacious arguments, which are logically incoherent and baseless arguments. To base your opinion on a particular topic, you must rely on scientific evidence, because this type of result is based on a methodology that ensures that it is a reliable source. For example, if you are discussing economics, you can base your research on data provided by the government economics department, a secure source that adopts a rigid methodological standard.

I’m going to guess #4 since that seems pretty logical.