Select the correct answer.
the national aeronautics and space administration (nasa) is a valuable source of information about earth and space science. each year, this us government agency fields a number of questions and comments from people around the world. the bar graph shows the number of information requests the agency received in 1999. which statement is true about the information in the graph?

a.
the number of monthly information requests by writing or phone never exceeds 600.
b.
emails made up the lowest percentage of information requests in the month of may.
c.
each month, the fewest number of information requests came from on-site researchers.
d.
trends show that the total number of information requests decreased from january to december.