The Table Below Shows Hypothetical Data for Volumes of E-Books

Multiple Choice

The table below shows hypothetical data for volumes of e-books and hardcover books sold over a 3-year period in a particular city.
TABLE 2-3
-Refer to Table 2-3.Suppose we choose Year 1 as the base year and construct a series of index numbers with which to analyze sales data.The index numbers for volumes of hardcover books sold (starting with Year 1) is

A) 431; 819; 100.
B) 43.1; 81.9; 100.
C) 100; 81.9; 43.1.
D) 100; 0.819; 0.431.
E) 0.431; 0.819; 100.