Let 1 Stand for "Any Given Period" and 2 Stand

Multiple Choice

Let 1 stand for "any given period" and 2 stand for "base period". The formula of any index number can be written as:

A) value of index at 1 = ^{absolute value at 1} absolute value at 2
B) value of index at 1 = ^{relative value at 1} × 100 relative value at 2
C) value of index at 1 = ^{relative value at 1} relative value at 2
D) value of index at 1 = ^{absolute value at 2} × 100 absolute value at 1