I have found the following question:
Which feature is required for multiple VLANs to span multiple switches?
a. A trunk to connect the switches.
b. A router to connect the switches.
c. A bridge to connect the switches.
d. A VLAN configured between the switches.
Correct answer by the author: a.
It is obvious that the answer is not really correct, because I can span multiple VLANs to multiple switches with only access ports too. Of course, with a trunk I can use less ports, but this is not explicit in the question and the text use the term "required". It is also true that the other answers are really not correct. I wondered if this type of misunderstanding could happen at Cisco exams.