What is the next number of the following sequence.
3, 10, 13, 20, 23, 30,  Select:
A) 28  B) 29  C) 30  D) 33  E) 36
3   3+7= 
<gadget id="calculator">3+7</gadget>
<output>10</output>
10   10+3= 
<gadget id="calculator">10+3</gadget>
<output>13</output>
13   13+7= 
<gadget id="calculator">13+7</gadget>
<output>20</output>
20   20+3= 
<gadget id="calculator">20+3</gadget>
<output>23</output>
23   23+7= 
<gadget id="calculator">23+7</gadget>
<output>30</output>
30   30+3= 
<gadget id="calculator">30+3</gadget>
<output>33</output>
33   ANSWER:33
<result>D</result>
What is the next number of the following sequence.
3, 10, 13, 20, 23, 30,