Final answer:
Option (a), The evaluation of customer reaction to feature trade-offs for price adjustments is classified under pricing and product-mix decisions in activity-based management, involving a careful cost/benefit analysis.
Step-by-step explanation:
Evaluating customer reaction to the trade-off of giving up some features of a product for a lower price falls under the category of pricing and product-mix decisions in activity-based management.
This involves a cost/benefit analysis where the manager compares the marginal costs against the marginal benefits to assess the potential impact on the customer base and the overall product strategy. This analysis is crucial for making informed decisions that balance customer expectations with the company's financial objectives.