What does CTS stand for?

CTS stands for Child Traumatic Stress. The other options, B, C, and D are incorrect because they do not accurately reflect the acronym 'CTS'. B, Cognitive Trauma Syndrome, may seem plausible, but 'CTTS' would be the appropriate acronym for that term. C, Critical Trauma Solution, and D, Child Therapy Session, do not include the term 'Stress' which is a key component of understanding CTS. Therefore, the correct answer is A, 'Child Traumatic Stress'.