Design a brief, evidence-based intervention bundle for a sedentary overweight pregnant person in early second trimester to reduce risk of gestational diabetes and hypertensive disorders. Which combination is most appropriate?

Immediate prescription of vigorous high-impact exercise that doubles baseline activity without dietary changes to rapidly reduce maternal weight during pregnancy before any nutrient counseling.

Complete carbohydrate elimination and a zero-sodium diet along with bed rest to minimize blood pressure and glucose levels, without clinical monitoring or professional oversight.

Weekly intravenous nutrient infusions combined with sporadic intense exercise sessions and no daily meal planning, relying solely on supplements to prevent metabolic disease.

Moderate-intensity aerobic activity 30 minutes most days of the week, individualized caloric guidance to achieve moderate gestational weight gain consistent with BMI, and increased intake of high-fiber foods with controlled carbohydrate distribution at meals to reduce postprandial glucose spikes.