The words used on a marker shown in Chapter11 can have a small difference from aMarker on your airplane, Chapter 11 uses EXAMPLE to show that there can be a smallInference. An example of this is the difference between the words LAVATORY and TOILET
选项：

A: LAVATORY and TOILET have sightly difference ,so they are not allowed to be used as marker on the same airplane at the same time
B: Lavatory and TOLET have completely different Meanings and must not be mixed
C: The meaning of this paragraph is that different words with the same meaning can be used on one airplane as markers.