Final answer:
It is not possible to determine the healthy range of curl ups for 12-14 year old females from the information provided in Table 1.31 without additional context.
Step-by-step explanation:
The curl up healthy range for 12-14 year old females can be inferred from standards set by fitness assessments like the Presidential Youth Fitness Program. However, based on the table provided, which seems to indicate different ranges without context, it would be speculative to answer definitively. Fitness standards can vary significantly depending on the organization or research upon which they are based. The ranges in Table 1.31 provided by Researcher A do not explicitly associate with curl up healthy ranges for the stated age group. Therefore, without additional context or reference to a specific test or standard, it is not possible to choose one of the provided options A) 25-35 Repetitions, B) 10-15 Repetitions, C) 15-20 Repetitions, D) 40-50 Repetitions as the correct healthy range for curl ups for 12-14 year old females.