An Alexa Skill Builder Did Not Include a Display Template

An Alexa Skill Builder did not include a display template in a skill. When the skill is used with an Amazon Alexa enabled device with a screen, cards used in the skill are:

A) rendered as a gray screen.
B) rendered using the skill icon as the foreground image.
C) rendered using the skill icon as the background image.
D) rendered using BodyTemplate1. rendered using BodyTemplate1.