Q1. Which property gives the CeNS smart oxide its ability to store charge and visibly indicate charge level?
A Its oxygen-deficient lattice with active sites for ion movement Correct
B Its use of only plastic insulation
C Its dependence on fossil-fuel combustion
D Its inability to change electronic structure
Explanation
The release explains that missing oxygen atoms create spaces and active sites that let ions move and trigger electronic changes. The other options are unrelated to the reported mechanism or contradict it.