Symptoms of hypoglycemia typically include:

The symptoms of hypoglycemia, or low blood sugar, primarily stem from the body's response to low glucose levels, which are essential for energy, especially for the brain. The correct choice highlights symptoms that are commonly associated with hypoglycemia, such as weakness, headache, and diaphoresis (sweating).

When blood glucose drops, the body may trigger a fight-or-flight response, leading to the release of stress hormones like adrenaline. This can result in the physical sensations of weakness and increased sweating. A headache may occur due to the brain not receiving enough glucose, as it relies heavily on this energy source for function. Thus, the symptoms in this option align well with the physiological effects of low blood sugar on the body.

In contrast, the symptoms related to excessive thirst and frequent urination are more commonly associated with hyperglycemia (high blood sugar) and conditions such as diabetes, making that option less relevant to hypoglycemia. Fatigue and confusion can be present in hypoglycemia, but they are not as indicative as the combination of weakness, headache, and diaphoresis. Nausea and vomiting can occur in various medical conditions but are not hallmark symptoms of hypoglycemia.