1. For every novel in the library there are 2 science books, for each science book there are 7 economics books. Express the ratio of economics books to science books to novels in the library as a triple ratio.
a.
7 : 2 : 1
b.
7 : 1 : 2
c.
14 : 7 : 2
d.
14 : 2: 1
e.
14 : 1 : 2