Final answer:
The Wilcoxon t value would have a value of 1.
Step-by-step explanation:
In a repeated-measures research study, the Wilcoxon t value is used to compare scores between two treatments.
If all 10 subjects in the study show higher scores with treatment a than with treatment b, the Wilcoxon t value would have a positive value, indicating a statistically significant difference between the two treatments.
The correct answer would be d. 1 as it represents a positive value, indicating that the scores with treatment a are higher than treatment b.