If Two Logicians Are Putting a Syllogism into Standard Form

If two logicians are putting a syllogism into standard form, but they choose two different types of syllogism (e.g., one makes it categorical and the other hypothetical) , could both of the resulting syllogisms be valid?

A) No, because a syllogism is only valid when it is in the correct form.
B) No, because for each kind of syllogism, the valid forms are completely different.
C) No, because validity depends on the relationship between the premises and the conclusion, which is fundamentally different from one type to another.
D) Yes, because the type chosen to represent the syllogism has no bearing on the truth of its conclusion.
E) Yes, because if the truth of the premises is sufficient to guarantee the truth of the conclusion, that will make the syllogism valid, regardless of the chosen type.