Answer:
C)
Explanation:
If each mark represents one-degree increments than in the half two marks, it represents a half degree. However, we can't affirm that the meniscus (the mark of the liquid in the thermometer) is exactly in the half, so the half-degree in an uncertain number. When we report a number, the uncertain number is the last significant digit of it, thus it must be reported as 28.5°C because at 28.50°C the uncertain would be the 0.
