1) challenge a) buying and selling of goods / services by computer
2) handbills b) activities done in order to increase the sales of a product
3) research c) a new or difficult task that tests somebody’s ability and skills
4) convince d) to make somebody believe that something is true
5) attempts e) to supply what or needed
6) transmissions f) a means of making use of something
7) access g) a process of passing something from one place, person to another
8) to provide h) a small printed advertisement that is given to people by hand
9) e-commerce i) a careful study of a subject of a subject to discover new facts
10) promotion j) to make an effort to accomplish something

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