Final answer:
The design of the interface affects the time spent on both inputting information and interpreting the output, impacting the individual performance.
Step-by-step explanation:
The design of the interface has a significant impact on how quickly a user can input information and interpret the output. An intuitive, well-designed interface can reduce the time spent on these tasks by making processes clear and easy to follow. In contrast, a poorly designed interface may lead to confusion and errors, increasing the time required for both inputting information and interpreting output, affecting overall individual performance.
To answer this specific question, the design of the interface affects the amount of time the user spends to perform both inputting information and interpreting the output. Therefore, the correct answer is d. Both a and b.