Giving Business Cards with the Left Hand in Malaysia,showing Soles

Giving business cards with the left hand in Malaysia,showing soles of shoes to a host in Saudi Arabia,and winking one eye in India are all considered impolite interpersonal communication due to the fact that:

A) in Middle Eastern countries it is customary to take off shoes at the door.
B) it is difficult to notice when one winks eyes since there are many people in India.
C) people pick up nonverbal cues and understand intuitively without being told.
D) these actions distract people from hearing at meetings.
E) people are not aware of Western ways of doing business.