Read the following context and choose the best option to answer the question.
Context: Taking puppy pictures are n't easy especially of you are a novice on the field . You need to do much practice in order to be good at it . One good way to practice is following a specific type of photography like taking portrait photos . Portrait photos are solo shots for your dogs .
Question: Why are puppy pictures hard to take ?
Options: 
A. None of the above choices .
B. Puppies sleep a lot .
C. Puppies blend in a lot .
D. Puppies do n't like to move .


A