Question

Determine which argument is valid.


A.


If a triangle is scalene, it has 3 sides of different lengths.
If a triangle has 3 sides with different lengths, the triangle has 3 angles of different measures.
If a triangle is scalene, the triangle has 3 angles of different measures.


B.


If an animal can fly, then it has wings.
If an animal is an eagle, then it has wings.
If an animal can fly, then it is an eagle.


C.


If it is a tree, then it has roots.
If it has leaves, then it is a plant.
If it is a tree, then it has roots and leaves.


D.


If a n