Identify the correct decreasing order of ease of dehydrohalogenation of alkyl halides.

• A
  $1^{\circ} > 3^{\circ} > 2^{\circ}$
• B
  $1^{\circ} > 2^{\circ} > 3^{\circ}$
• C
  $3^{\circ} > 2^{\circ} > 1^{\circ}$
• D
  $2^{\circ} > 3^{\circ} > 1^{\circ}$