What is the least integer that is a sum of four different prime numbers?  Choose the correct option
A) 15 B) 17 C) 19 D) 21 E) 23
The sum of the four smallest primes is 2+3+5+7= 
<gadget id="calculator">2+3+5+7</gadget>
<output>17</output>
17.   The answer is 17.
<result>B</result>
What is the least integer that is a sum of four different prime numbers?