Which risk escalates as radioisotope thermoelectric generators (RTGs) degrade in deep-space probes?

💡 Explanation

Increased radiation exposure risk escalates due to radioactive decay altering the isotopic composition via alpha decay; this shifts daughter products, because these decay chain products emit different energies causing more external gamma radiation, therefore B describes the rising hazard better than component failure.

• Which outcome results when stellar core iron fusion plateaus?
• Which consequence arises when reactor-grade enriched uranium contains excessive U-236?
• Which outcome reduces accuracy reading flowmeters approaching laminar-turbulent transition?
• What mechanism causes increased reactivity when an alkene coordinates to a platinum catalyst?
• Which state change occurs when dynamic equilibrium is disrupted in a saturated solution of potassium nitrate due to endothermic solvation?
• Which consequence results when nitrogen vacancies increase within a gallium nitride semiconductor?