What is true about saliva and the remineralization process?

Saliva is supersaturated with calcium and phosphate ions, which are delivered to demineralized enamel surfaces to support remineralization. Saliva also contains proteins (statherin, proline-rich proteins) that inhibit crystal growth and maintain the supersaturated state. Additionally, saliva buffers acids produced by plaque bacteria (through bicarbonate and phosphate buffer systems), neutralizing pH and creating conditions favorable for remineralization. Salivary flow rate varies significantly throughout the day - it is highest during eating and lowest during sleep (option b is incorrect). Fluoride enhances remineralization by forming fluorapatite, which is more acid-resistant than hydroxyapatite.