(1) Shipping along rivers is not as popular as it once was. (2) It is done by air and trucking on interstates. (3) Rivers still provide viable routes for shipping, but it is no longer the most feasible method for moving materials. (4) As rivers declined in popularity, other shipping methods took their place as the best ways to ship merchandise.

Which sentence lacks a logical transition?

A. 1
B. 2
C. 3
D. 4