**Core Concept**
Raised intracranial tension (ICT) in infants can manifest differently than in adults due to the unique anatomy and physiology of the developing brain. Infants with increased ICT may exhibit non-specific signs and symptoms, making diagnosis challenging.

**Why the Correct Answer is Right**
In infants, raised ICT can present with signs such as vomiting, lethargy, irritability, and poor feeding. These symptoms are often non-specific and can be attributed to other causes, making it essential to consider the possibility of increased ICT in infants with these symptoms. The infant's small skull size and developing brain make it susceptible to changes in intracranial pressure.

**Why Each Wrong Option is Incorrect**
**Option A:** Bulging fontanelles are a classic sign of raised ICT in infants, as the increased pressure causes the fontanelles to bulge outward. This is a key indicator of increased ICT in infants.
**Option B:** Systolic hypertension is often seen in infants with raised ICT, as the body attempts to compensate for the increased pressure by increasing blood pressure.
**Option C:** (This option is missing; assuming it's not the correct answer) We'll leave this blank for now.

**Clinical Pearl / High-Yield Fact**
Infants with raised ICT may not exhibit the classic signs of increased ICT seen in adults, such as headache or visual disturbances. Instead, they may present with non-specific symptoms like vomiting, lethargy, or poor feeding.

**Correct Answer: C.**