Question

What does the following sentence represent?
The water level of the river dropped by 15 inches over two days!
A. +15
B. -15

Answer 1

B. (Dropped infers its negative)

Answer 2

b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b bb b b b b b