(p.126, The African American and the Settling of the West, Sarah Nichols and Marie Hernandez, ed.Aaron Wilds.)
The answer you are looking for is B, participle.
The correct answer is The new cloak
<em>She </em><em>requested</em><em> </em><em>him </em><em>that </em><em>he </em><em>wait </em><em>there </em><em>until</em><em> </em><em>she </em><em>returned</em><em>.</em>