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A
A blunt one-length cut
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B
Layered or graduated cuts where the guide moves as you work
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C
No shape
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D
A shorter fringe only
Why this is the answer
A traveling (mobile) guideline moves along as the cosmetologist works through the head, with each new section referencing the previously cut hair. This technique is used mainly to create layered or graduated cuts, where length changes gradually. By contrast, a stationary guideline brings all hair to one fixed point to create one-length or strongly graduated effects. Knowing the difference between stationary and traveling guides — and which produces layers — is standard haircutting theory tested on the exam.
Source: Hair Care — Traveling Guideline