Action-at-a-distance forces do not require direct contact between objects to exert an effect. Which statement is true?

Action-at-a-distance forces do not require direct contact between objects to exert an effect. Which statement is true?

• A. Direct contact is required for a force to occur.
• B. Action-at-a-Distance forces do not require direct contact between objects to exert an effect.
• C. Forces can only act when objects touch.
• D. They disappear in vacuum.

Answer: (B)