An envioronmentalist has read that the mean number of species in an acre of the rainforest is 78.4. They believe that the mean number is less than that. They collect 42 different acres in the rainforest and compute a sample mean of 76.3 species. Which of the following options appropriate null and alternative hypothesis?

A) H_O: M=78.4 versus H_a: M<78.4

B)H_O: M=78.4 versus H_a: slash through equal sign 78.4