Select the two type of threads mentioned in the concept of multithreading:

(a) foreground

(b) background

(c) only foreground

(d) both foreground & background

The question was asked in an interview for internship.

My question comes from Multithreaded Programming topic in section Reflections, Multithreaded Programming, Collection Classes and Mathematical Functions of C#

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  x+=y;
  y+=x;
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  main()
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  foo(x,x);
  }
  What is the final value of x in both call by value and call by reference, respectively?
  (A) 5 and 16
  (B) 5 and 12
  (C) 5 and 20
  (D) 12 and 20
  
  

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  (B) non-key and non-ordering
  (C) key and ordering
  (D) key and non-ordering
  
  

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  (C) 12
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