Explanation:

- Option 1: Response

- "Response" refers to a reaction to something, such as a reply or answer.

- Does not fit well in the context of creating a client's perception.

- Option 2: Notion

- "Notion" means a conception or belief about something.

- It's not typically used to describe the immediate effect on a client.

- Option 3: Outlook

- "Outlook" relates to a person's attitude or view toward life or the future.

- An outlook is broader and doesn't exactly capture the specific short-term effect on a client.

- Option 4: Impression

- "Impression" pertains to an immediate effect or feeling that something or someone leaves on another.

- It is the best fit for describing how appearance might affect clients.