Which statement is true about this argument ? premises: if the triangle has three sides of equal length than it is in equilateral triangle of the side links o if a triangle has three sides of equal length than it is in equilateral triangle the side lengths of triangle def are 3 cm 3 cm and 3 cm. conclusion: triangle def is an equilateral triangle. a)the argument is valid by the law of detachment b)the argument is not valid because the conclusion does not follow from the premises c)the argument is not valid because the premises are not true d)the argument is valid by the law of syllogism