How do you evaluate an argument for soundness?

confirm that deductive reasoning is used
check for validity and evaluate the accuracy of each premise
verify that inductive reasoning is used
analyze the effective use of word choice and figures of speech

The answer is: check for validity and evaluate the accuracy of each premise.

Soundness, in formal logic (that is to say, the characteristic of logic that states that the validity of an argument is based on its logical form and not its content; both Aristotelian syllogistic logic and symbolic logic are examples of formal logic), is the property of a logical system that states that if and only if every formula (or premise, if we were to speak in terms of syllogisms) in the system is logically valid then it is sound. Logically valid means, in general terms, that it possesses the value of truth as provable.  

b,c,

what is the