Transfer Function of a pressure sensor - what does it tell me?
Incremental value for a signal may be calibrated more accurately between 2 active thresholds of range rather than 0 to 100% which be more non-linear at the extent of the range.
For best accuracy, choose the range that is closest to your application. That seems to be 0 to 100% for a pump.  But what is the ratio at max pressure to the sensor is a question TBD.
Depending on your pump pressure to sensor range ratio you may want B or A.
B has a 10:1 span or gain ratio yet only 22.5% of max range may fit your selection.
Since pumps are calibrated at a fixed temperature and all pressure sensors have a Gain and Offset error, no matter how small, these are 3 optional ways to improve your accuracy by the OEM's calibration method.
Knowing the model gain and offset version A,B,C you can then compute the sensitivity of the sensor:
Gain =  Count/Range , where Range = Pmax-Min   A=80%, B= 20%, C=  60% of total rating. So gain or count sensitivity depends on the max P (psi) and the transfer function A,B,C calibration.
Offset=  Count = 0 for Pressure = 0 bar, as it is a differential pressure type.
The total error depends on customer &quot;auto-zero&quot; or offset calibration with 0 pressure.

Datasheet which was missing in question