While out trick-or-treating for halloween, at first billy's neighbors had to remind him to say "trick or treat" before they dropped their treats into his bag. as he continued to visit houses in the neighborhood, soon billy would say "trick or treat" as soon as the neighbors answered the door. the treats he received were the for his saying "trick or treat".

a) conditioned stimulus
b) reinforcement
c) reward
d) discriminative stimulus

Early 18th century british industries were generally small scale and relatively unsophisticated. most textile production, for example, was centred on small workshops or in the homes of spinners, weavers and dyers: a literal ‘cottage industry’ that involved thousands of individual manufacturers. such small-scale production was also a feature of most other industries, with different regions specialising in different products: metal production in the midlands, for example, and coal mining in the north-east.two illustrations of 18t