Which of the following combinations involves only acro elements?

The correct response involves recognizing that acro elements in gymnastics specifically refer to skills that involve a movement of the body in an aerial or dynamic manner, typically performed on the balance beam in this case.

In the context of the choices provided, the combination identified focuses solely on acrobatic skills, with reference to the progression and difficulty of the movements involved. Each level of difficulty (such as A, B, C, D, and E) corresponds to various gymnastic elements, with higher letters representing more complex skills.

The selection contains a combination that fits the definition of typically recognized acro elements without integrating dance or leap components, which would introduce additional categories of skills. This distinction is crucial because it isolates the skills to be purely acrobatic, allowing for a focused approach during assessment or competition.

Thus, identifying a combination that strictly includes acro elements is fundamental in gymnastics judging, particularly to ensure that routines meet the criteria for technical execution and artistry as laid out in gymnastics scoring systems.