Inferences are A.
nver made by scientists.
B. exactly the same as observations.
C. questions that are made by studying conclusions or predictions.
D.
conclusions or predictions that are made by studying observations.

D. conclusions or predictions that are made by studying observations.

Explanation:

Scientists use the evidence form observations to make an inference

. ph changes the ability of them he enzyme to dissolve in water.

its probably to later but whats the question