Final answer:
A substantial 93% of effective communication is often said to be attributed to nonverbal communication, which includes body language and cultural norms.
Step-by-step explanation:
According to a study, a substantial percentage of effective communication is attributed to nonverbal communication or body language. The options provided indicate different percentages, and among them, the number often cited in various studies is 93%. This figure suggests that a majority of the messages we convey in interactions, especially in the workplace, are transmitted through our body language, facial expressions, gestures, and other forms of nonverbal cues. These nonverbal signals can include cultural norms, such as when to shake hands or how to sit, as well as universal gestures like smiling to express joy.