Flying demands a much greater supply of energy __________(比其他运输方式).

A．The use of ocean-current meters to determine the direction and velocity of the ocean’s mesoscale fields.
B．The use of earthquake shock-wave data collected at several different locations and combined to create a three-dimensional image of the Earth’s interior.
C．The use of a grid-point sensory system to map global weather patterns.
D．The use of subsurface floats to map large-scale circulation in the ocean.

A．the possible mass-production of the super glue
B．their concern about the cost of collecting mussels
C．their concern about the extinction of the species
D．the world’s limited demand for the super glue