根据下列背景信息,回答以下5个小题 Consider a region with two standardized products (bread and shirts) that are transported by horse-drawn wagons. There is a single trading city. Consider the effects of a new matter transmitter(物质传送机), an indivisible input(不可分的投入品) that is economical for trading firms in the city, but not economical for an individual household. A transmitter instantly transports goods from a production site (a farm or work- shop) to the trading firm, and the marginal cost of transport is zero. Q1: The labor used in transporting products from production sites to trading firms will( ) (1.0分) A. increase B. decrease C. not change