The value of a + b is a bb a

• A. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>(a + b)</center></td></tr><tr><td style="text-align: center;">(a b)</td></tr></table>
• B. 1
• C. 2ab
• D. 1