Gram-negative bacteria that cause infections, when stained, do not retain the crystal violet stain, which tells the researcher that

The correct option is B The peptidoglycan layer is very thin and the bacteria are resistant to antibiotics.
The peptidoglycan layer of the gram negative bacteria are thin and are also referred to as the cell envelope. The layer is wavy and provides resistance to antibiotics. They are more virulent as compared to Gram positive bacteria

So, the correct answer is 'The peptidoglycan layer is very thin and the bacteria are resistant to antibiotics'