What were Vincent's health conditions determined at his birth?

Vincent's health conditions determined at his birth included a significant probability of a heart disorder, as well as a neuro disorder and ADD. Option C reflects the high likelihoods associated with these conditions, specifically noting a 99% chance of a heart disorder, 60% chance of a neuro disorder, and 89% chance of having ADD.

This portrayal is crucial within the context of the film "GATTACA," which emphasizes the implications of genetic predispositions on an individual's life. Vincent's genetic profile sets a foundation for his struggles against societal expectations and prejudices based on his perceived genetic disadvantages. The other options do not represent the dramatic health risks showcased in the narrative, making option C the most accurate representation of Vincent's genetic health predictions at birth.