Bacillus thuringiensis has been used to kill certain insects such as
$(a)$ Tobacco budworm
$(b)$ Army worm
$(c)$ Beetles
$(d)$ Flies
$(e)$ Mosquitoes

• A
  $b, c$ and $d$
• B
  $a, b$ and $e$
• C
  $a, c, d$ and $e$
• D
  $a, b, c, d$ and $e$