Final answer:
Refusal to take a breath test is often treated as if the driver had a BAC level that is above the legal limit of 0.08%.
Step-by-step explanation:
In most US states, refusal to take a breath test when suspected of driving under the influence of alcohol is considered a separate offense. The level of blood alcohol concentration (BAC) associated with this offense varies by state. However, it is often treated as if the driver had a BAC level that is above the legal limit of 0.08%. For example, if the legal limit is 0.08% and a driver refused the breath test, they may be charged as if their BAC was 0.08% or higher.