According to Section 7.2.3:
"Quantitative RBI uses logic models depicting combinations of events that could result in severe accidents and physical models depicting the progression of accidents... Hence more detailed information and data are needed for a fully quantitative RBI in order to provide input for the models." The need for detailed data in quantitative analysis is primarily to enable the use of logic and physical models in assessing risk.
Reference: API 580, 2nd Edition (2016), Section 7.2.3
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As defined in Section 3.1.59 of API 580:
"Risk assessment: The systematic use of information to estimate risk and conduct risk evaluation." Option A refers more closely to hazard identification, C is the definition of risk management, and D describes part of the risk analysis process, but not the full definition of risk assessment.
Reference: API 580, 2nd Edition (2016), Section 3.1.59

According to Section 6.6 of API 580 (2016), titled "Estimating Resources and Time Required," it is clearly stated:
"The resources and time required to implement an RBI assessment will vary widely between organizations depending on a number of factors including the following:
a) implementation strategy/plans.
b) knowledge and training of implementers.
c) availability and quality of necessary data and information.
d) availability and cost of resources needed for implementation.
e) amount of equipment included in each level of RBI analysis.
f) degree of complexity of RBI analysis selected.
g) degree of precision required."
This confirms the following are among the officially listed influencing factors:
A: Knowledge and training of implementers#
C: The degree of precision required#
D: Amount of equipment included#
However:
B: Cost of mitigation activities -#Not listed in Section 6.6 as a driver for time/resources during implementation.
E: Type of damage mechanisms involved -#Relevant to PoF modeling, but not a direct listed factor for estimating time/resources needed to implement the RBI.
Reference: API 580, 2nd Edition (2016), Section 6.6 - Estimating Resources and Time Required

API 580 clearly identifies this capability:
"The RBI process is capable of generating:
a) a ranking by relative risk of all equipment evaluated."
Additionally, Section 4.6 explains that:
"Calculating absolute risk can be very time-consuming and costly... RBI is focused on a systematic determination of relative risk." Reference: API 580, 2nd Edition (2016), Sections 4.6 and Output Features of RBI

According toAPI 580, Section 7.3, thequality of datais explicitly identified as having adirect relationto the relative accuracyof the RBI analysis:
"The data quality has a direct relation to the relative accuracy of the RBI analysis.Although the data requirements are quite different for the various types of RBI analysis, quality of input data is equally important no matter what approach to RBI is selected." The section also emphasizes the need forvalidation of data inputs and assumptions by qualified personnel, underscoring the fact thatdata quality-not merely its precision or origin-is the key influencerof the reliability of results.
Therefore:
Data precision (A)andData validation (D)support reliability but arenot as foundationalto accuracy as overalldata quality.
Data sources (C)contribute to quality but are not as decisive as quality itself.
Correct and verified per API 580 Section 7.3.
Reference: API 580-02-2016, Section 7.3 -Data Quality