Those who aquire quick money are impatient to flaunt their wealth and material possessions.

The correct answer is: D. ostentatious

Ostentatious means characterized by vulgar or pretentious display. It is often used to describe people who show off their wealth or

The other options are:

• A. waste – to use or spend carelessly or extravagantly.
• B. squander – to spend extravagantly or foolishly.
• C. hide – to keep something out of sight or knowledge.

Of these, only ostentatious is consistent with the idea of people who acquire quick money being impatient to show off their wealth.