What do people most probably believe in about a process

A．The most recent figure is for 1975 and the figure is declining.
B．Water transport's market share goes up and down frequently.
C．So few miles of inland waterways exist that no one has bothered to count them.
D．You must know whether to include coastwise and inter-coastal shipping in the figure.

A．almost always leads to more failure
B．provides an opportunity to new experiences
C．makes us afraid to take risks
D．hurts children more than adults