Number three because the rest use commas
It is a transitive sentence because the verb to love is transitive.
Transitive verbs are those which demand a direct object after them. Here, the verb is to love, and its direct object are flowers. You can easily see if a verb is transitive by asking the question - What?
What does she love? - Flowers.
Since we have an answer, it means that the verb, and the entire sentence, are transitive.
The right answer is D. Once you get your schedule, proceed to your first class quickly, quietly, and directly.
Have a nice day! <3