1. A hazard analysis can be used to evaluate a potential hazard; what other information should be considered?

I go with Risk assessment 

Option "c" Risk assessment

C-Risk Assessment

Choice C) Risk assessment

b. Statistical data

RICK ASSESSMENT

A, B, C and D can give you information about potential hazards

Given all the choices, all are relevant when evaluating hazards.

After a hazard is identified, First Statistical data is extracted and then Risk assessment is done.Statistical data means Counts, number of items, repetitions, steps, etc then comes risk assesment

All of the choices you gave are a part of the hazard analysis. But you lack one thing, and this should be that "other information" your asking. It's, "Determining Controls".