Step 1: Understanding the Question.
The question is testing recall of a specific terrorist incident from mid-2007, so we need to remember what happened and where.
Step 2: Key Formula or Approach.
Recall the sequence of events: a failed car-bomb plot in London was followed almost immediately by an attack on an airport terminal.
Step 3: Detailed Explanation.
On 30 June 2007, two car bombs were found in central London before they could detonate. The very next day, a Jeep Cherokee loaded with propane canisters was driven into the glass doors of the terminal building at Glasgow Airport in Scotland and set alight.
Heathrow is London's busiest airport and a common distractor because of its size and profile, but it was not the site of this attack.
Birmingham Airport and Nottingham (which does not even have a major international airport) are both unrelated to the incident and included only to test careful recall.
Step 4: Final Answer.
The airport attacked by the burning vehicle in this incident was Glasgow, so option (A) is correct.