throw in and the line

[stewcall]

Our association has had this discussion in the past.
Team A on a spot throw in..

A. Foot touches the out of bounds line

B Foot touches line and court

C Foot touches only Court


Obviously C is a violation.
I have heard the rational that the line is out of bounds so A nd B are legal.... This seems to be against the spirit of the out of bounds throw in. thoughts....

thanks in advance

Stew in VA
CVBOA