Question

which accumulates over time in order for science to progress?
a material
b confusion
c dissent
d evidence

Explanation:

Science progresses based on the accumulation of evidence. Evidence is gathered through experiments, observations, etc., which helps in validating or refuting theories. Material is not what directly makes science progress. Confusion and dissent do not accumulate to drive scientific progress in a positive - forward - moving way.

Answer:

D. evidence