What evidence can be used in court to result in a conviction for impaired driving?

• Only a Blood Alcohol Concentration (BAC) test result
• Only the officer's observations of the driver
• Both the BAC test result and officer's observations
  Explanation:

  "Observations and information gathered by the arresting officer are also evidence that may be used in court and can result in a conviction without a BAC test. The law prohibits driving a motor vehicle while impaired by alcohol or other substances. An alcohol concentration of more than 0.05 is relevant evidence that the driver’s ability to drive was impaired."
• None of the above