A market study for a new industrial product indicates that the should be launched by the firm only if the mean number of units purchased per customer in the first solicitation of the firm's customers is more than 2.0. Choose the relevant hypotheses for conducting a test in order to reach decision about the launch of the product

a)H0: 2.0 H1:>2.0

b) H0: <2.0 H1:2.0

c) H0: =2.0 H1:2.0

d) H0: >2.0 H1:2.0

e) H0: 2.0 H1:<2.0