Final answer:
The own-occupation definition (A) makes it easier to qualify for total disability benefits as it is specific to one's actual job rather than any job for which they could be qualified, as in the any-occupation definition (B).
Step-by-step explanation:
The definition that would generally make it easier to qualify for total disability benefits is A) Own-occupation definition. This definition implies that an individual is considered disabled if they are unable to perform the duties of their own specific occupation, which is often a narrower and more individual-specific assessment. On the other hand, the B) Any-occupation definition is broader, requiring the individual to be unable to perform the duties of any job for which they are reasonably suited by education, experience, and age, making it harder to qualify for benefits. The C) Presumptive disability definition refers to certain conditions that are assumed to be totally disabling, but these are typically severe and very specific conditions. Lastly, the D) Partial disability definition pertains to individuals who are not totally disabled and could therefore be still capable of working in some capacity, which might not qualify them for total disability benefits.