Which form other than oral speech could be most commonly used among blind people （）

A．There are many forms of communication in existence today.
B．Language is the most common form of communication.
C．Tourists are incapable of using an oral form of communication.
D．Ideas and thoughts can be transmitted by body languag

A．Students are academically capable of making comments on the skills of teaching.
B．Students are actually capable of judging the class accomplishments of lectures.
C．Students likes and interests are the standards of evaluation of a teacher’s lecturing.
D．Students are not to give assessments of a teacher’s lecturin