A sleeping partner is one who __________.

The correct answer is: A. contributes capital.

A sleeping partner is a partner in a business who does not take an active role in the management of the business, but who contributes capital to the business. The sleeping partner is usually a passive investor who is not involved in the day-to-day operations of the business.

The other options are incorrect because:

• Option B is incorrect because a sleeping partner does not take an active part in the business.
• Option C is incorrect because a sleeping partner does not contribute members to the business.
• Option D is incorrect because a sleeping partner does not contribute materials to the business.

I hope this helps! Let me know if you have any other questions.