The correct option is b) 1.5-4. The best estimate for personal distance in Western cultures is around 1.5 to 4 feet.
The term personal distance is often used to describe the physical space distance between communicating parties in western cultures. For example, when people are talking in a group setting or in a one-on-one setting, the physical distance between them that is viewed as appropriate makes up for the personal distance range.
You can learn more about personal distance from a related question here https://brainly.in/question/5605173
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