C

Reasoning:  
• In infants, hypotension is defined as systolic BP < 70 + 2 × age (yrs); for a 6-month-old that cut-off is ≈71 mm Hg, so this child’s SBP 85 mm Hg is still within the normal range, meaning shock has not yet decompensated [Kissoon, 2010, PMID 21057288].  
• The child shows clear signs of impaired perfusion—capillary refill 4 s, mild tachycardia and tachypnea—despite preserved blood pressure. These findings correspond to the compensated (pre-hypotensive) phase of hypovolemic shock; because perfusion is already markedly abnormal, it is considered the late part of that compensated phase rather than “early” [Han, 2003, PMID 14523168].  

Therefore the picture fits late compensated hypovolemic shock.