Final answer:
An alkalizer can neutralize acids and increase pH but cannot lower pH or break down disulfide bonds, as their purpose is to make solutions more basic by reducing hydrogen ion concentration.
Step-by-step explanation:
An alkalizer is a substance that can neutralize acids and increase pH levels by reducing the concentration of hydrogen ions in a solution. This is usually accomplished by providing hydroxide ions (OH-) or other negatively charged ions that combine with hydrogen ions, thus raising the pH. Therefore, the correct answer to what alkalizers cannot do is C) Lower pH since their function is to make solutions more basic, not acidic. Additionally, alkalizers do not have the ability to break down disulfide bonds; this is typically a function of certain chemicals, such as those found in some types of household cleaners, which can degrade complex molecules.