In the following sentence, a part of the sentence is underlined. Below are given alternatives to the underlined part, which may improve the sentence. Choose the correct alternative. In case no improvement is needed, choose the option that indicates 'No improvement'.

Without distractions, it's too obvious from your brain that you're not doing anything with it and you start to feel uncomfortable.

A. Obvious of your brain

B. Obvious to your brain

C. Obvious for your brain

D. Obvious off your brain