Please choose the correct ending to complete the given sentence: Food and Entertaining: [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.

Ending1: Chin: large wrinkles can often cause the appearance of lower teeth to protrude. Feline chin means tall and full, hence the wrinkles. Ending2: 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. Ending3: [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. Ending4: [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.

Answer format: ending1/ending2/ending3/ending4