The correct answer is:
B. A substance in a solution that captures hydrogen ions and raises the pH
Step-by-step explanation:
Bases are substances that, in aqueous solution, release hydroxide (OH−) ions, are smooth to the touch, can taste bitter if an alkali,[1] change the color of indicators (e.g., turn red litmus paper blue), react with acids to form salts, increase particular chemical reactions (base catalysis), receive protons from any proton donor, and/or contain completely or partially displaceable OH− ions