McDowell and Wixted's (1986) Schedule with the Molar Properties of a VR

Multiple Choice

McDowell and Wixted's (1986) schedule with the molar properties of a VR schedule, but with the molecular properties of a VI schedule, is called a:

A) Variable ratio plus linear feedback (VR+) schedule
B) Variable interval plus linear feedback (VI+) schedule
C) Variable ratio plus variable interval (VR+VI+) schedule
D) Linear feedback plus IRT (LF+IRT) schedule