If \(\frac{1}{a+b+7}=\frac{1}{a}+\frac{1}{b}+\frac{1}{7}\) and a + b ≠ 0 and a + b ≠ –7, then the possibilities are:-

• A. a = 7 or b = 7
• B. a = 7 and b = –7
• C. a = –7 or b = 7
• D. a = –7 or b = –7