Use the Law of Syllogism to draw a conclusion.
If a substance is water, then its molecular structure is H2O. If a substance has molecular structure H2O, then its boiling point at sea level is 100°C.
Choices:
If a substance has a boiling point of 100°C, then it is water.
H2O has a boiling point of 100°C.
If a substance is water, then its boiling point at sea level is 100°C.
If a substance has a boiling point of 100°C, then it has molecular structure H2O.

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