What statements apply to the term "blind spot"?

You answered correctly. The blind spot is a dangerous area around your vehicle that cannot be seen with your mirrors alone. This is especially risky for cyclists, as they can be hidden from view when overtaking or turning. Always look over your shoulder to check the blind spot before changing lanes or turning, since relying only on mirrors is not enough. The third statement about the turning circle is not related to the definition of a blind spot. Remember: the blind spot means an area that is visually blocked, not physically inaccessible.