Why should drivers be alert to bicyclists who might suddenly swerve or turn?

• Because bicyclists may need to swerve left to make a right turn around a corner to prevent hitting the curb side
• Because bicyclists may forget or not have the opportunity to merge left, in order to be in the left turn lane, due to traffic speed
  Explanation:

  "Be vigilant for bicyclists who might swerve or turn unexpectedly. They may need to quickly merge left for a turn, especially when traffic speed prevents them from doing so earlier."
• Because bicyclists have relatively large blind spots which make them unaware of their surrounding
• None of the above