From the Window of an Office on a Skyscraper's 90

Multiple Choice

From the window of an office on a skyscraper's 90?? floor,taxis on the street look tiny.Of course,you know they're not toy cars; you're just a long way up.This example illustrates the ___ depth cue of ___.

A) monocular; familiar size
B) binocular; familiar size
C) monocular; texture gradient
D) binocular; texture gradient