Question

What does the phrase "look sharp" mean in these lines?
"Now, then!" growled Sikes, as Oliver started up; "half-past five! Look sharp, or you'll get no breakfast; for it's late as it is."

Oliver was not long in making his toilet; having taken some breakfast, he replied to a surly inquiry from Sikes, by saying that he was quite ready.
(from Oliver Twist by Charles wingspanens)
be sluggish
wake up
hurry up
work carefully