Answer:
The true statement(s) are:
C. The right use of words creates confidence. Using appropriate and positive language can contribute to creating confidence in communication.
None of the other statements (A, B, and D) are true:
A. The way we sit (body language) can indeed affect our tone of voice indirectly. Body language can influence how we feel and come across, impacting the overall communication process.
B. Using negative words to convey a positive attitude is not true. Positive attitudes are generally expressed through positive and affirming language.
D. When customers disagree with you, it's generally advisable not to give excuses but rather to address their concerns, find solutions, and maintain a positive and customer-focused approach. Giving excuses may come across as defensive and unhelpful.