Read the following context and choose the best option to answer the question.
Context: We 're mixing browns and blacks which i m still not sure about , but I think if we find a cool picture with browns in it and put it above the couch in the black frame , it may tie things together better . Who knows . Five .
Question: Why is the narrator a bit doubtful about their painting ?
Options: 
A. They do n't like the model .
B. They do n't like the shapes used .
C. They do n't know about the colors .
D. They do n't like the subject .


C