Categorize the following factors affecting photosynthesis into internal and external factors:
$I-$ Light
$II-$ Temperature
$III-$ Age and size of leaf
$IV-$ Leaf orientation
$V-$ Mesophyll cells and chloroplasts
$VI-$ $CO_2$ concentration
$VII-$ Water
$VIII-$ Chlorophyll content
$IX-$ Internal $CO_2$ concentration
Identify the correct sequence for internal factors and external factors respectively.

• A
  $II, III, IV, V, VIII, IX$ and $I, VI, VII$
• B
  $III, IV, V, VIII, IX$ and $I, II, VI, VII$
• C
  $III, IV, V, VII, VIII, IX$ and $I, II, VI$
• D
  $I, II, III, IV, V, VII, VIII, IX$ and $VI$