1) which statement is true about this argument?
premises: if a polygon has six sides, then it is a hexagon. polygon abcdef has six sides.
conclusion: polygon abcdef is a hexagon.
a) the argument is not valid because the conclusion does not follow from the premises.
b) the argument is valid by the law of detachment.
c) the argument is valid by the law of syllogism.
d) the argument is not valid because the premises are not true.