Consider the Following to Answer the Question(s) Below

Multiple Choice

Consider the following to answer the question(s) below:
The cost of a university education has increased at a much faster rate than costs in general over the past twenty years. In order to compensate for this, many students work part- or full-time in addition to attending classes. At one university, it is believed that the average number of hours students work per week exceeds 20. A random sample of 20 students was selected and the following values were observed:

-The correct null and alternative hypotheses are

A) H0 : µ = 20 and HA : µ > 20.
B) H0 : µ = 20 and HA : µ ≠ 20.
C) H0 : µ = 20 and HA : µ < 20.
D) H0 : µ > 20 and HA : µ = 20.
E) H0 : µ < 20 and HA : µ > 20.