Which argument is valid?



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nbarrera

Algebra Help Please! anyone! Will MEDAL!

Which argument is valid?

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AIf a polygon is a square, it has four right angles.

If a polygon is a rectangle, then it has four right angles.

If a polygon is a rectangle, then it is a square.

BIf a number is divisible by 12, then it is divisible by 6.

If a number is divisible by 6, then it is divisible by 2.

If a number is divisible by 12, then it is divisible by 2

CIf it is a dog, then it barks.

If it has a tail, then it is an animal.

If it is a dog, then it barks and has a tail.

DIf an animal can swim, then it has fins.

If an animal is a fish, then it has fins.

If an animal can swim, then it is a fish.