When 5 + 1 = 56, 6 + 1 = 67, 7 + 1 = 78, then 8 + 1 = ? Choose the correct choice from the following answers
A) 85
B) 98
C) 89
D) 105
E) 129
5 + 1 =&gt; 5 x 1 = 5 &amp; 5 + 1= 
<gadget id="calculator">5 + 1</gadget>
<output>6</output>
6=&gt; 5 &amp; 6 =&gt; 56   6 + 1 =&gt; 6 x 1 = 6 &amp; 6 + 1= 
<gadget id="calculator">6 + 1</gadget>
<output>7</output>
7=&gt; 6 &amp; 7 =&gt; 67   7 + 1 =&gt; 7 x 1 = 7 &amp; 7 + 1= 
<gadget id="calculator">7 + 1</gadget>
<output>8</output>
8=&gt; 7 &amp; 8 =&gt; 78   Then 8 + 1 =&gt; 8 x 1 = 8 &amp; 8 + 1= 
<gadget id="calculator">8 + 1</gadget>
<output>9</output>
9=&gt; 8 &amp; 9 =&gt; 89   Answer : 89
<result>C</result>
When 5 + 1 = 56, 6 + 1 = 67, 7 + 1 = 78, then 8 + 1 = ?