The correct answer is option 'c) Recorded evidence'.

Explanation:
Grapevine communication refers to the informal communication that takes place within an organization. It is characterized by the transmission of information through unofficial channels, such as rumors, gossip, and informal conversations among employees. While grapevine communication has several features, one of these features is not being recorded evidence. Here's a detailed explanation of each feature:

a) Flexibility:
- Grapevine communication is flexible in nature. It can adapt to the dynamic needs of the organization and can transmit information quickly and efficiently.
- Unlike formal communication channels, grapevine communication is not bound by strict rules or protocols. It can be informal, casual, and flexible.

b) Rapid communication:
- Grapevine communication is known for its speed and quick transmission of information.
- As it operates through informal channels, information can spread rapidly within the organization.
- This can be advantageous in situations where quick dissemination of information is required.

c) Recorded evidence:
- This is the feature that is not associated with grapevine communication.
- Unlike formal communication channels, grapevine communication is not recorded or documented.
- Information transmitted through grapevine communication is often based on rumors, gossip, or personal opinions, which may not be accurate or reliable.
- As a result, there is no recorded evidence of grapevine communication, making it difficult to trace or verify the source of information.

d) Spontaneous:
- Grapevine communication is spontaneous in nature.
- It occurs naturally among employees without any formal planning or organization.
- It can arise during informal conversations, coffee breaks, or social gatherings within the organization.

In conclusion, while grapevine communication is characterized by features such as flexibility, rapid communication, and spontaneity, it does not involve recorded evidence. Grapevine communication relies on informal channels and is not documented, making it difficult to trace or verify the information transmitted through it.