Find out the LOWEST annual growth rate among the following:

Option A) Annual growth rate of total wagons in 1999

The growth rate in 1999 over 1998 = $$\dfrac{\left(252944-263981\right)}{263981}\times\ 100=-4.18\%$$

Option B) Annual growth rate of covered wagons in 1998

The growth rate in 1998 over 1997 = $$\dfrac{\left(102217-106634\right)}{106634}\times\ 100=-4.14\%$$

Option C) Annual growth rate of special type wagons in 2002

The growth rate in 2002 over 2001 = $$\dfrac{\left(37275-38884\right)}{38884}\times\ 100=-4.13\%$$

Option D) Annual growth rate of total wagon capacity in 2000

The growth rate in 2000 over 1999 = $$\dfrac{\left(10.26-10.7\right)}{10.7}\times\ 100=-4.11\%$$

Thus, the correct option is A.