In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Q: [header] How to identify a basenji dog [title] Look for a wrinkled forehead. [step] One of the basenji's most distinctive features is its forehead, which displays a shar-pei-like wrinkle at all times. This can lend a puzzled or anxious expression to its face, but it's just the natural fold and texture of its skin. <sep> (A) Chin: large wrinkles can often cause the appearance of lower teeth to protrude. Feline chin means tall and full, hence the wrinkles. (B) The smooth forehead can either be a reliable indication of a basenji's age, and or it's just a toollayer beneath the appearance of its face. [substeps] A basenji can produce a rectangular face with a squarish nose. (C) [substeps] Stress wrinkles are often brought on by stress by frustration, lack of discipline, or too much stimulation. [title] Look for a large, rounded head. (D) [substeps] This wrinkle may seem more pronounced in puppies, who have more excess skin and folds. It will also be less noticeable in basenjis with brindled, black, or tricolored coats.
A:
D