Can we draw the following hypothesis from the context (see options)? 

Context:

How to calculate blood alcohol level<br>Understand what blood alcohol content (bac) means. Blood alcohol content is a measurement of the amount of alcohol in your body. So, a bac of 0.10% means 1 part alcohol for every 1000 parts of blood.

Hypothesis: bac is measured very accurately.

[a]. Yes
[b]. It's impossible to say
[c]. No
[b].